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Many people don’t measure their blood pressure properly at home – here’s how to get accurate readings

<p><em><a href="https://theconversation.com/profiles/niamh-chapman-2262829">Niamh Chapman</a>, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a>; <a href="https://theconversation.com/profiles/dean-picone-2264237">Dean Picone</a>, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a>, and <a href="https://theconversation.com/profiles/eleanor-clapham-2264235">Eleanor Clapham</a>, <a href="https://theconversation.com/institutions/university-of-tasmania-888">University of Tasmania</a></em></p> <p>Measuring your blood pressure at home means you can take readings over several days to get a better picture of your health, instead of one-off measurements at the doctor’s clinic.</p> <p>It’s important you follow specific steps to get an accurate reading.</p> <p>But <a href="https://www.ahajournals.org/doi/10.1161/HYPERTENSIONAHA.124.23678">our study</a> found most Australians do not measure their blood pressure correctly at home and very few were told the steps to follow.</p> <p>We have created <a href="https://bloodpressuretoolkit.com/">resources</a> to help people measure their blood pressure at home, understand their readings and take action with their health-care team.</p> <h2>High blood pressure is a big issue</h2> <p>High blood pressure is a major health problem in Australia and globally.</p> <p><a href="https://onlinelibrary.wiley.com/doi/full/10.5694/mja2.51350">One in three Australian adults</a> have high blood pressure, also called hypertension. This is when your <a href="https://www.heartfoundation.org.au/your-heart/blood-pressure-and-your-heart">blood pressure</a> is <a href="https://www.ahajournals.org/doi/10.1161/HYPERTENSIONAHA.120.15026">at or above 140/90mmHg</a> (mmHg refers to millimetres of mercury, a standard measurement of blood pressure).</p> <p>High blood pressure is the <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10881002/">leading contributor</a> to preventable health issues and early death among Australians because it is the main risk factor for heart disease, stroke, dementia and kidney disease.</p> <h2>Why measuring blood pressure is important</h2> <p>High blood pressure often has no symptoms. So the only way to know if you have it is to measure it.</p> <p>You may also need to check if your blood pressure has lowered after starting medication or if you’re making changes to your lifestyle, such as doing more exercise, giving up smoking or reducing salt intake. Low blood pressure (<a href="https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/blood-pressure-low-hypotension">hypotension</a>) can also be an issue.</p> <p>But blood pressure changes based on how we are feeling, what we’ve eaten or the activities we have just been doing.</p> <p>These normal responses mean our blood pressure can change from minute to minute and hour to hour. This is why there are specific, recommended steps to follow to reliably measure your blood pressure and to be able to compare readings taken days, months and years apart.</p> <hr /> <p><iframe id="lBVm6" class="tc-infographic-datawrapper" style="border: 0px none currentcolor;" src="https://datawrapper.dwcdn.net/lBVm6/" width="100%" height="400px" frameborder="0" scrolling="no"></iframe></p> <hr /> <h2>Mistakes are common</h2> <p>We surveyed and interviewed 350 people (who were all measuring their blood pressure at home) from around Australia to find out how Australians measure blood pressure at home and if they receive any education to help them know what to do.</p> <p>Our study found no one followed all of the specific, recommended steps to measure their blood pressure. Instead they said they measured their blood pressure at different times of the day after doing different things.</p> <p>We found most people measured their blood pressure while sitting down (90%) and with the cuff on their bare arm (77%), which is the right thing to do.</p> <p>While 58% of people took two blood pressure measures each time, which is correct, only 40% used the average of the two blood pressure readings. Very few (15%) measured their blood pressure over several days in both the morning and evening.</p> <p>Only half of the people in our study used a blood pressure device that had been <a href="https://bloodpressuretoolkit.com/what_device_should_i_use">clinically validated</a>. This means the device has been <a href="https://www.ahajournals.org/doi/10.1161/HYPERTENSIONAHA.117.10237">tested for accuracy</a> by the manufacturer according to <a href="https://www.iso.org/sectors/health">international standards</a>, not just safety.</p> <h2>Consultation and communication</h2> <p>Regardless of whether or not a doctor had recommended they measure their blood pressure at home, most people (78%) reported their blood pressure readings to their doctor.</p> <p>These findings tell us doctors often use home blood pressure readings to help diagnose and manage high blood pressure. This emphasises how important it is to ensure people measure blood pressure correctly.</p> <p>Many people were measuring their blood pressure a few times a week or month. But most <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4671913/">guidelines</a> recommend blood pressure only needs to be measured at home: every day over a week, every six months; and ideally before you see your doctor and after you start or change blood pressure medication.</p> <p>Measuring blood pressure at home can bring peace of mind, which many study participants described. But measuring your blood pressure too often may create unnecessary stress, potentially leading to higher blood pressure readings.</p> <p>Instead, it’s better to agree with your doctor how often you should measure your blood pressure and to follow the recommended steps each time to make sure your readings are as accurate and useful as possible.</p> <h2>Support for blood pressure measurement</h2> <p>We found few people had received any education or guidance from health-care professionals about how to measure their blood pressure at home.</p> <p>Instead, many study participants looked for information online to help them know what their blood pressure numbers meant and changes they could make to lower their blood pressure. They were less interested in learning how to measure accurately.</p> <p>So we have worked with people who measure and manage their blood pressure at home to create a <a href="https://bloodpressuretoolkit.com/">simple guide</a> to help you choose a blood pressure device, measure your blood pressure accurately, understand your blood pressure readings and take action to control your blood pressure.</p> <hr /> <p><em>For more information about managing your blood pressure at home, <a href="https://bloodpressuretoolkit.com/">see our resources</a>. You can also check if your blood pressure device has been <a href="https://bloodpressuretoolkit.com/what_device_should_i_use">tested for accuracy</a>.</em><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/244161/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/niamh-chapman-2262829">Niamh Chapman</a>, Senior Research Fellow, Hypertension and Patient Engagement, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a>; <a href="https://theconversation.com/profiles/dean-picone-2264237">Dean Picone</a>, Senior Research Fellow, Sydney School of Health Sciences, Faculty of Medicine and Health, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a>, and <a href="https://theconversation.com/profiles/eleanor-clapham-2264235">Eleanor Clapham</a>, PhD candidate, School of Health and Medicine, <a href="https://theconversation.com/institutions/university-of-tasmania-888">University of Tasmania</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/many-people-dont-measure-their-blood-pressure-properly-at-home-heres-how-to-get-accurate-readings-244161">original article</a>.</em></p>

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There are 2 main ways to stretch – the one you should choose depends on what you want your body to do

<p><em><a href="https://theconversation.com/profiles/hunter-bennett-1053061">Hunter Bennett</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a> and <a href="https://theconversation.com/profiles/lewis-ingram-1427671">Lewis Ingram</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p>Picture this: you’ve just woken up and rolled out of bed. Your feet hit the floor, and your legs buckle. They are in absolute agony – that run yesterday has really come back to haunt you.</p> <p>And then you remember you forgot to stretch before and after your run. Surely that’s the reason you’re so sore today. Or is it?</p> <p>We’ve all heard about the importance of stretching before and after exercise. But does it really make a difference? Here’s what the science says.</p> <h2>What is stretching?</h2> <p>There are many different types of stretching, but the two most common are <a href="https://pubmed.ncbi.nlm.nih.gov/22319684">static and dynamic stretching</a>.</p> <p>Static stretching involves moving a muscle (or muscles) into a lengthened position and holding this for a <a href="https://pubmed.ncbi.nlm.nih.gov/15292749/">short period of time</a> – often anywhere between 15 and 90 seconds.</p> <p>A common example of this would be keeping your heels on the ground while leaning forward to touch the ground with a straight knee to stretch your hamstring muscles.</p> <p>Meanwhile, <a href="https://pubmed.ncbi.nlm.nih.gov/21373870/">dynamic stretching</a> involves actively moving your muscles and joints back and forth through their available range of motion.</p> <p>Common examples include swinging your legs back and forth, from side to side, or swinging your arms in circles.</p> <h2>Stretching before exercise</h2> <p>The main reasons people stretch before exercise are to increase flexibility, improve performance, and reduce the risk of injury.</p> <p>While we know stretching <a href="https://pubmed.ncbi.nlm.nih.gov/29223884/">increases flexibility</a>, its effect on <a href="https://pubmed.ncbi.nlm.nih.gov/17909411/">performance</a> and <a href="https://pubmed.ncbi.nlm.nih.gov/18027995/">injury</a> is less clear. But let’s look at what the evidence says for each one.</p> <p><strong>Flexibility</strong></p> <p>Both static and dynamic stretching increase flexibility, although static stretching seems to have a <a href="https://www.sciencedirect.com/science/article/pii/S2095254623000571">slightly larger effect</a>.</p> <p>Short-term static stretching inhibits your <a href="https://www.healthline.com/health/why-does-stretching-feel-good#:%7E:text=Research%20has%20shown%20that%20static,of%20your%20sympathetic%20nervous%20system.">sympathetic nervous system</a> (your fight or flight system), which reduces the stiffness of your <a href="https://www.sciencedirect.com/science/article/pii/S2095254624000693#bib0010">muscles and tendons</a>. This makes you more flexible straight after stretching.</p> <p>In the long term, static stretching is thought to make you more flexible by increasing the length of <a href="https://pubmed.ncbi.nlm.nih.gov/37318696/">your muscles and tendons</a> or by simply making you <a href="https://pubmed.ncbi.nlm.nih.gov/28801950/">more tolerant to the discomfort caused by stretching</a>.</p> <p><strong>Performance</strong></p> <p>When it comes to improving performance, this will depend on the type of physical activity you’re doing.</p> <p>If you are about to move your body through large ranges of motion – something like gymnastics or dancing – then the improvements in flexibility following stretching will likely result in better performance.</p> <p>On the flip side, research has shown static stretching may <a href="https://pubmed.ncbi.nlm.nih.gov/26642915/">impair performance</a> by up to 5% in activities that rely on maximum strength and power, such as shotput and powerlifting.</p> <p>This might be because of the reduced nervous system activation we mentioned earlier, making it more challenging for your muscles to produce force.</p> <p>However, significant impairments only seem to occur when stretching for <a href="https://pubmed.ncbi.nlm.nih.gov/26642915/">more than 60 seconds</a>. Stretching for less than 60 seconds appears to impact performance minimally (by around 1%).</p> <p>On the other hand, dynamic stretching increases <a href="https://pubmed.ncbi.nlm.nih.gov/12762825">muscle temperature</a> and the speed at which your nerves <a href="https://cdnsciencepub.com/doi/10.1139/apnm-2015-0235">send messages to your muscles</a>, which might improve muscle performance.</p> <p>Dynamic stretching has been shown to <a href="https://bmcsportsscimedrehabil.biomedcentral.com/articles/10.1186/s13102-023-00703-6">enhance strength and power by a small amount</a>. This might make it a better option before activities that are performed explosively, such as sprinting, jumping, lifting weights or playing team sport.</p> <p><strong>Injury and soreness</strong></p> <p>When it comes to reducing injury, whether stretching before exercise is beneficial remains unclear.</p> <p>Many studies have shown stretching <a href="https://pubmed.ncbi.nlm.nih.gov/24100287/">doesn’t have an effect</a>. But a lot of these look at the effect of stretching on all types of injuries, which might not show its true effect.</p> <p>For example, a broken arm from a tackle would be grouped with a calf strain, but it seems logical that stretching is more likely to reduce the risk of the calf muscle strain than the broken arm.</p> <p>A <a href="https://link.springer.com/article/10.1007/s11332-024-01213-9">recent review</a> did explore the effect of stretching on different types of injuries and found static stretching may reduce the risk of muscle, but not tendon, injuries. To date, there’s no evidence to suggest stretching would reduce the risk of broken bones and contact injuries.</p> <p>There’s very little research exploring whether dynamic stretching alone can reduce injury risk. <a href="https://link.springer.com/article/10.1007/s40279-023-01847-8">One study</a> showed dynamic stretching can improve joint stability, which might reduce the risk of joint injuries (such as ankle sprains). But more research is needed to make any conclusions with confidence.</p> <p>Many people also stretch before exercise to help prevent muscle soreness after exercise. However, <a href="https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD004577.pub3/full">research has shown</a> stretching before exercise has no meaningful impact on muscle soreness after exercise.</p> <h2>Stretching after exercise</h2> <p>The main reason people stretch after exercise is to improve recovery and reduce muscle soreness. The most common approach is static stretching.</p> <p>However, like stretching before exercise, research doesn’t indicate stretching after exercise reduces <a href="https://pubmed.ncbi.nlm.nih.gov/27447321/">muscle damage or soreness</a>.</p> <p>It has also been suggested <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4831894/">really intense stretching can damage your muscles</a>, which might even make muscle soreness worse. But this isn’t a consistent finding, and may only happen to certain people.</p> <p>However, stretching does <a href="https://pubmed.ncbi.nlm.nih.gov/21386722/">promote relaxation</a>. So gentle stretching could be a nice way to wind down after an intense exercise session.</p> <h2>So, what should you do?</h2> <p>Maybe a lack of stretching isn’t the reason you were sore after you run after all. Your legs are probably aching because you simply ran further, or harder, than you normally do.</p> <p>But that doesn’t mean you shouldn’t stretch.</p> <p>The available evidence suggests doing some dynamic stretching before exercise will increase flexibility and improve your performance, whether you’re planning to go for a run, play a team sport, or lift weights.</p> <p>Static stretching can be great if you want to increase your flexibility, just don’t do it right before intense exercise. And after exercise, some gentle static stretching can help transition the body to a more relaxed state.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/244048/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/hunter-bennett-1053061">Hunter Bennett</a>, Lecturer in Exercise Science, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a> and <a href="https://theconversation.com/profiles/lewis-ingram-1427671">Lewis Ingram</a>, Lecturer in Physiotherapy, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/there-are-2-main-ways-to-stretch-the-one-you-should-choose-depends-on-what-you-want-your-body-to-do-244048">original article</a>.</em></p>

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Ant stings can be painful. Here’s how to avoid getting stung this summer (and what to do if you do)

<p><em><a href="https://theconversation.com/profiles/sam-robinson-2237268">Sam Robinson</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p>With the start of summer just days away, many of us will be looking forward to long sunny days spent at the beach, by the pool, out camping or picnicking in the park.</p> <p>Insects also love summer. This is when most of them <a href="https://www.australiangeographic.com.au/topics/science-environment/2016/12/experts-predict-increased-insect-activity-this-summer/">breed and feed</a>. But this shared appreciation of the season can sometimes lead to conflict.</p> <p>Insects have long been prey to many species, including birds, mammals, amphibians and other insects. As such, they’ve evolved a diverse range of defences – perhaps none more familiar to humans than the sting.</p> <p>Many ants have a sting at their rear end which they use to deliver venom. It’s not the sting itself that causes pain, but rather <a href="https://www.nature.com/articles/s41467-023-38839-1">the venom</a>. Ant venom contains a cocktail of different chemicals, some of which have evolved specifically to manipulate nerve endings in our skin to cause pain.</p> <p>Let’s look at some of the different ant stings you might experience this summer in Australia, and how to respond.</p> <h2>Bull ants</h2> <p>Bull ants (also known as bulldog ants, jumper ants, or jack jumpers) are large, for an ant. Some species can reach a length of <a href="https://en.wikipedia.org/wiki/Myrmecia_(ant)#:%7E:text=Each%20of%20their%20eyes%20contains,mm%20(1.5%20in)%3B%20M.">4 centimetres</a>. They are easily recognisable with their large eyes, long mandibles (jaws) and aggressive nature.</p> <p>Their sting is immediate, hot, sharp, and unmistakable, not dissimilar to that of a honeybee. The intense pain will last only a few minutes, before it’s replaced by some redness and swelling around the sting site.</p> <h2>Green-head ants</h2> <p>Green-head ants are also called green ants (but not to be confused with the <a href="https://en.wikipedia.org/wiki/Oecophylla_smaragdina">green tree ants</a> of northern Australia which do not sting). Green-head ants are common, and love our grass lawns.</p> <p>At around <a href="https://en.wikipedia.org/wiki/Green-head_ant">6 millimetres long</a>, they are significantly smaller than bull ants. They can be recognised by their shiny green and purple exoskeleton.</p> <p>Green-head ants tend to be less aggressive than bull ants, but they can still deliver a meaningful sting. The pain of a green-head ant’s sting can build more gradually, and create an intense, sticky ache.</p> <h2>Fire ants</h2> <p>Fire ants (or red imported fire ants) are originally from South America. They were first detected <a href="https://www.fireants.org.au/stop/how-fire-ants-arrived-in-australia">in Brisbane in 2001</a>, thought to have hitched a ride in shipping containers, and have since spread across south-east Queensland.</p> <p>Fire ants are reddish-brown and black and range in size from <a href="https://www.fireants.org.au/look/appearance">2–6 millimetres long</a>.</p> <p>You’re most likely to encounter fire ants at their nests, which look like a pile of powdery soil. A fire ant nest doesn’t have an obvious entry, which is a good way to distinguish them from other similar ant nests.</p> <p>Disturbing a fire ant nest will awaken an angry mass of hundreds of ants and put you at risk of being stung.</p> <p>The initial pain from an individual sting is like an intense, hot itch, though manageable. But fire ant stings rarely occur in single digits. One ant can sting multiple times, and multiple ants can sting one person, which can lead to <a href="https://theconversation.com/fire-ants-are-on-the-march-heres-what-happens-when-they-sting-218908">hundreds of stings</a>. Fire ant stings can lead to pus-filled ulcers and scarring in the days afterwards.</p> <p>If you live in an area where there are fire ants, it’s worth taking a few minutes to educate yourself on how to <a href="https://www.fireants.org.au/look">recognise and report</a> them.</p> <h2>Electric ants</h2> <p><a href="https://www.antwiki.org/wiki/Wasmannia_auropunctata">Electric ants</a> are another nasty accidental import, originally from Central and South America. Currently restricted to <a href="https://www.outbreak.gov.au/current-outbreaks/electric-ants">Cairns and surrounds</a>, these are tiny (1.5 millimetres long) yellow ants.</p> <p>Like fire ants, these ants will typically defend <em>en masse</em>, so many will sting at once. Their sting is more painful than you’d expect from such a tiny creature. I liken it to being showered in red hot sparks.</p> <p>If you think you see electric ants, you should report this to <a href="https://www.business.qld.gov.au/industries/farms-fishing-forestry/agriculture/biosecurity/animals/invasive/restricted/electric-ant">Biosecurity Queensland</a>.</p> <h2>Aussie ants aren’t the worst</h2> <p>You might be surprised to hear Australian ants don’t even make the podium for the most painful ant stings. Among the prize winners are <a href="https://www.press.jhu.edu/books/title/10878/sting-wild">harvester ants</a> (North and South America) which cause an extreme, sticky ache, likened to a drill slowly turning in your muscle – for as long as 12 hours.</p> <p>The gold medal goes to the sting of the bullet ant of South and Central America, which <a href="https://www.press.jhu.edu/books/title/10878/sting-wild">has been described</a> as:</p> <blockquote> <p>Pure, intense, brilliant pain. Like walking over flaming charcoal with a 3-inch nail embedded in your heel.</p> </blockquote> <h2>How to avoid getting stung (and what to do if you do)</h2> <p>Fortunately, the solution is usually very simple. Look before you sit on the ground or lay out your picnic blanket, avoiding areas where you see ant nests or lots of foraging ants.</p> <p>Choice of footwear can also be important. In my experience, perhaps unsurprisingly, most stings occur on thong-wearing feet.</p> <p>If you do get stung, in most cases it’s going to get better on its own. Pain will usually subside after a few minutes (sometimes a little longer for a green-head ant sting). The redness, swelling and itch that typically follow can last for a few days.</p> <p>In the meantime, if needed, <a href="https://www.healthdirect.gov.au/insect-bites-and-stings">an ice pack</a> will help with the pain. If it’s particularly bad, a local anaesthetic cream containing lidocaine may offer some temporary relief. You can get this over the counter at the pharmacy.</p> <p>A small proportion of people may have an allergic reaction to ant stings. In very severe cases this might involve <a href="https://www.healthdirect.gov.au/insect-bites-and-stings#anaphylaxis">trouble breathing</a> or swallowing. If you or someone you’re with experiences these symptoms after an ant sting, seek urgent medical attention.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/241582/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/sam-robinson-2237268">Sam Robinson</a>, Senior Research Fellow, Institute for Molecular Bioscience, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/ant-stings-can-be-painful-heres-how-to-avoid-getting-stung-this-summer-and-what-to-do-if-you-do-241582">original article</a>.</em></p>

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Is thunderstorm asthma becoming more common?

<p><em><a href="https://theconversation.com/profiles/kira-morgan-hughes-1520392">Kira Morgan Hughes</a>, <a href="https://theconversation.com/institutions/deakin-university-757">Deakin University</a></em></p> <p>When spring arrives, so do warnings about thunderstorm asthma. But a decade ago, most of us hadn’t heard of it.</p> <p>So where did thunderstorm asthma come from? Is it a new phenomenon?</p> <p>In 2016, the world’s most <a href="https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(18)30120-7/fulltext">catastrophic thunderstorm asthma</a> event took Melbourne by surprise. An increase in warnings and monitoring is partly a response to this.</p> <p>But there are also signs climate change may be exacerbating the likelihood of thunderstorm asthma, with more extreme weather, extended pollen seasons and a rise in Australians reporting hay fever.</p> <h2>A landmark catastrophe</h2> <p>The first time many Australians heard of thunderstorm asthma was in November 2016, when a <a href="https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(18)30120-7/fulltext">major event</a> rocked Melbourne.</p> <p>During a late night storm, an estimated <a href="https://www.jaci-inpractice.org/action/showFullTableHTML?isHtml=true&amp;tableId=tbl1&amp;pii=S2213-2198%2820%2931133-8">10,000 people</a> were rushed to hospitals with severe asthma attacks. With thousands of calls on emergency lines, ambulances and emergency departments were unprepared to handle the rapid increase in people needing urgent medical care. Tragically, ten of those people died.</p> <p>This was the most catastrophic thunderstorm asthma event in recorded history and the first time deaths have ever occurred anywhere in the world.</p> <p>In response, the Victorian Department of Health <a href="https://www.health.vic.gov.au/environmental-health/epidemic-thunderstorm-asthma-program">implemented initiatives</a>, including public awareness campaigns and improvements to health and emergency services, to be ready for future thunderstorm asthma events.</p> <p>A network of <a href="https://www.melbournepollen.com.au/faqs/how-has-epidemic-thunderstorm-asthma-forecasting-system-been-developed/">pollen monitoring stations</a> was also set up across the state to gather data that helps to predict future events.</p> <h2>A problem for decades</h2> <p>While this event was unexpected, it wasn’t the first time we’d had thunderstorm asthma in Australia – we’ve actually known about it for decades.</p> <p>Melbourne reported its first instance of thunderstorm asthma back in 1984, only a year after this phenomenon was <a href="https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(85)91510-7/fulltext">first discovered</a> in Birmingham in the United Kingdom.</p> <p>Thunderstorm asthma has since been reported in other parts of Australia, including Canberra and New South Wales. But it is still most common in Melbourne. Compared to any other city (or country) the gap is significant: over a quarter of all known events worldwide have <a href="https://www.jaci-inpractice.org/article/S2213-2198(20)31133-8/fulltext">occurred in Melbourne</a>.</p> <h2>Why Melbourne?</h2> <p>Melbourne’s location makes it a hotspot for these kinds of events. Winds coming from the north of Melbourne tend to be dry and hot as they come from deserts in the centre of Australia, while winds from the south are cooler as they come from the ocean.</p> <p>When hot and cool air mix above Melbourne, it creates the perfect conditions for <a href="https://dro.deakin.edu.au/articles/thesis/Enemies_of_the_air_beware_impact_of_weather_parameters_on_airborne_allergens_and_asthma_presentations/21118435">thunderstorms</a> to form.</p> <p>Northern winds also blow a lot of pollen from farmlands into the city, in particular grass pollen. This is not only the <a href="https://link.springer.com/article/10.1007/bf02136145">most common cause</a> of seasonal hay fever in Melbourne but also a <a href="https://karger.com/iaa/article-abstract/116/4/253/163752/Thunderstorm-Asthma-Due-to-Grass-Pollen?redirectedFrom=fulltext">major trigger of thunderstorm asthma</a>.</p> <h2>Why grass pollen?</h2> <p>There’s a particular reason grass pollen is the main culprit behind thunderstorm asthma in Australia. During storms there is a lot of moisture in the air. Grass pollen will absorb this moisture, making it swell up like a water balloon.</p> <p>If pollen absorbs too much water whilst airborne, it can burst or “<a href="https://www.thelancet.com/journals/lancet/article/PII0140-6736(92)90864-Y/fulltext">rupture</a>,” releasing hundreds of microscopic particles into the air that can be swept by powerful winds.</p> <p>Normally, when you breathe in pollen it gets stuck in your upper airway – for example, your nose and throat. This is what causes typical hay fever symptoms such as sneezing or runny nose.</p> <p>But the microscopic particles released from ruptured grass pollen are <a href="https://pubmed.ncbi.nlm.nih.gov/22794674/">much smaller</a> and don’t get stuck as easily in the upper airway. Instead, they can travel deep into your airways until they reach your lungs. This may trigger more severe symptoms, such as wheezing or difficulty breathing, even in people with <a href="https://publications.ersnet.org/content/erj/16/1/3">no prior history of asthma</a>.</p> <h2>So who is at risk?</h2> <p>You might think asthma is the biggest risk factor for thunderstorm asthma. In fact, the biggest risk factor is hay fever.</p> <p>Up to <a href="https://www.resmedjournal.com/article/S0954-6111(17)30351-7/fulltext">99% of patients</a> who went to the emergency department during the Melbourne 2016 event had hay fever, while a majority (60%) had no prior diagnosis of asthma.</p> <p><a href="https://www.tandfonline.com/doi/full/10.1080/24745332.2020.1727301">Every single person</a> hospitalised was allergic to at least one type of grass pollen. All had a sensitivity to <a href="https://www.agric.wa.gov.au/grains-research-development/annual-ryegrass">ryegrass</a>.</p> <h2>Is thunderstorm asthma becoming more common?</h2> <p>Thunderstorm asthma events are rare, with just <a href="https://www.jaci-inpractice.org/article/S2213-2198(20)31133-8/fulltext">26 events</a> officially recorded worldwide.</p> <p>However there is evidence these events could become more frequent and severe in coming years, due to climate change. Higher temperatures and pollution could be making <a href="https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(19)30015-4/fulltext">plants produce more pollen</a> and <a href="https://onlinelibrary.wiley.com/doi/10.1111/imj.13699">pollen seasons last much longer</a>.</p> <p>Extreme weather events, including thunderstorms, are also expected to become <a href="https://onlinelibrary.wiley.com/doi/10.1111/all.14177">more common and severe</a>.</p> <p>In addition, there are signs rates that hay fever may be increasing. The number of Australians reporting allergy symptoms have risen from <a href="https://www.aihw.gov.au/reports/chronic-respiratory-conditions/allergic-rhinitis-hay-fever-in-australia/summary">15%</a> in 2008 to <a href="https://www.abs.gov.au/statistics/health/health-conditions-and-risks/health-conditions-prevalence/latest-release">24%</a> in 2022. <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4356643/">Similar trends in other countries</a> has been linked to climate change.</p> <h2>How can I prepare?</h2> <p>Here are three ways you can reduce your risk of thunderstorm asthma:</p> <ul> <li> <p>stock up on allergy medication and set up an <a href="https://asthma.org.au/manage-asthma/asthma-action-plan/">asthma action plan</a> with your GP</p> </li> <li> <p>check daily <a href="https://www.pollenforecast.com.au/">pollen forecasts</a> for the estimated pollen level and risk of a thunderstorm asthma event in your local area</p> </li> <li> <p>on days with high pollen or a high risk of thunderstorm asthma, spend less time outside or wear a <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8431835/">surgical face mask</a> to reduce your symptoms.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/243929/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> </li> </ul> <p><em><a href="https://theconversation.com/profiles/kira-morgan-hughes-1520392">Kira Morgan Hughes</a>, PhD Candidate in Allergy and Asthma, School of Life and Environmental Sciences, <a href="https://theconversation.com/institutions/deakin-university-757">Deakin University</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/is-thunderstorm-asthma-becoming-more-common-243929">original article</a>.</em></p>

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7 things you can do if you think you sweat too much

<p><em><a href="https://theconversation.com/profiles/michael-freeman-223922">Michael Freeman</a>, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a></em></p> <p>Sweating is our body’s way of cooling down, a bit like an internal air conditioner.</p> <p>When our core temperature rises (because it’s hot outside, or you’re exercising), sweat glands all over our skin release a watery fluid. As that fluid evaporates, it takes heat with it, keeping us from overheating.</p> <p>But sweating can vary from person to person. Some people might just get a little dewy under the arms, others feel like they could fill a swimming pool (maybe not that dramatic, but you get the idea).</p> <p>So what’s a normal amount of sweat? And what’s too much?</p> <h2>Why do some people sweat more than others?</h2> <p>How much you sweat depends on a number of <a href="https://www.tandfonline.com/doi/pdf/10.1080/23328940.2019.1632145">factors</a> including:</p> <ul> <li> <p>your age (young kids generally sweat less than adults)</p> </li> <li> <p>your sex (men tend to sweat more than women)</p> </li> <li> <p>how active you are.</p> </li> </ul> <p>The average person sweats at the rate of <a href="https://www.tandfonline.com/doi/pdf/10.1080/23328940.2019.1632145">300 millilitres per hour</a> (at 30°C and about 40% humidity). But as you can’t go around measuring the volume of your own sweat (or weighing it), doctors use another measure to gauge the impact of sweating.</p> <p>They ask whether sweating interferes with your daily life. Maybe you stop wearing certain clothes because of the sweat stains, or feel embarrassed so don’t go to social events or work.</p> <p>If so, this is a medical condition called <a href="https://www.dermcoll.edu.au/atoz/axillary-hyperhidrosis/">hyperhidrosis</a>, which affects <a href="https://onlinelibrary.wiley.com/doi/pdf/10.1111/1346-8138.16908">millions of people</a> worldwide.</p> <p>People with this condition most commonly report problematic armpit sweating, as you’d expect. But sweaty hands, feet, scalp and groin can also be an issue.</p> <p>Hyperhidrosis can be a symptom of another medical condition, such as an <a href="https://www.frontiersin.org/articles/10.3389/fendo.2023.1167890/pdf">overactive thyroid</a>, <a href="https://www.tandfonline.com/doi/pdf/10.1080/23328940.2019.1632145">fever or menopause</a>.</p> <p>But hyperhidrosis can have no obvious cause, and the reasons behind this so-called primary hyperhidrosis are a bit of a mystery. People have normal numbers of sweat glands but researchers think they simply over-produce sweat after triggers such as stress, heat, exercise, tobacco, alcohol and hot spices. There may also be a genetic link.</p> <h2>OK, I sweat a lot. What can I do?</h2> <p><strong>1. Antiperspirants</strong></p> <p>Antiperspirants, particularly ones with <a href="https://onlinelibrary.wiley.com/doi/pdf/10.1111/ics.12852">aluminium</a>, are your first line of defence and are formulated to reduce sweating. Deodorants only stop body odour.</p> <p><a href="https://www.drugs.com/mtm/aluminum-chloride-hexahydrate-topical.html#:%7E:text=Aluminum%20chloride%20hexahydrate%20is%20an,excessive%20sweating%2C%20also%20called%20hyperhidrosis.">Aluminum chloride hexahydrate</a>, <a href="https://go.drugbank.com/drugs/DB11081">aluminium chloride</a> or the weaker <a href="https://cosmileeurope.eu/inci/detail/807/aluminum-zirconium-tetrachlorohydrex-gly/">aluminum zirconium tetrachlorohydrex glycinate</a> react with proteins in the sweat glands, forming a plug. This plug temporarily blocks the sweat ducts, reducing the amount of sweat reaching the skin’s surface.</p> <p>These products can contain <a href="https://www.termedia.pl/Journal/-7/pdf-46948-10?filename=Hyperhidrosis.pdf">up to 25%</a> aluminium. The higher the percentage the better these products work, but the more they irritate the skin.</p> <p><strong>2. Beat the heat</strong></p> <p>This might seem obvious, but staying cool can make a big difference. That’s because you have less heat to lose, so the body makes less sweat.</p> <p>Avoid super-hot, long showers (you will have more heat to loose), wear loose-fitting clothes made from breathable fabrics such as cotton (this allows any sweat you do produce to evaporate more readily), and carry a little hand fan to help your sweat evaporate.</p> <p>When exercising try <a href="https://pathprojects.com/blogs/news/how-to-make-an-ice-bandana-for-trail-running-and-hiking?srsltid=AfmBOorsJpNUDs_ZkAkJDFbDFFSeT5TtWsU4aqI4-_hHWbl_wuZLsgHn">ice bandanas</a> (ice wrapped in a scarf or cloth, then applied to the body) or wet towels. You can wear these around the neck, head, or wrists to reduce your body temperature.</p> <p>Try also to modify the time or place you exercise; try to find cool shade or air-conditioned areas when possible.</p> <p>If you have tried these first two steps and your sweating is still affecting your life, talk to your doctor. They can help you figure out the best way to manage it.</p> <p><strong>3. Medication</strong></p> <p>Some <a href="https://www.termedia.pl/Journal/-7/pdf-46948-10?filename=Hyperhidrosis.pdf">medications</a> can help regulate your sweating. Unfortunately some can also give you side effects such as a dry mouth, blurred vision, stomach pain or constipation. So talk to your doctor about what’s best for you.</p> <p>Your GP may also refer you to a dermatologist – a doctor like myself who specialises in skin conditions – who might recommend different treatments, including some of the following.</p> <p><strong>4. Botulinum toxin injections</strong></p> <p>Botulinum toxin injections are not just used for cosmetic reasons. They have many applications in medicine, including blocking the nerves that control the sweat glands. They do this for many months.</p> <p>A dermatologist usually gives the injections. But they’re only subsidised by <a href="https://www9.health.gov.au/mbs/fullDisplay.cfm?type=item&amp;q=18362&amp;qt=ItemID">Medicare</a> in Australia for the armpits and if you have primary hyperhidrosis that hasn’t been controlled by the strongest antiperspirants. These injections are given up to three times a year. It is not subsidised for other conditions, such as an overactive thyroid or for other areas such as the face or hands.</p> <p>If you don’t qualify, you can have these injections privately, but it will cost you hundreds of dollars per treatment, which can last up to six months.</p> <p><strong>5. Iontophoresis</strong></p> <p>This involves using a device that passes a weak electrical current through water to the skin to <a href="https://www.sciencedirect.com/science/article/am/pii/S254243272030014X">reducing sweating</a> in the hands, feet or armpits. Scientists aren’t sure exactly how it works.</p> <p>But this is the <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9826940/">only way</a> to control sweating of the hands and feet that does not require drugs, surgery or botulinum toxin injections.</p> <p>This treatment is not subsidised by Medicare and not all dermatologists provide it. However, you can buy and use your own device, which tends to be cheaper than accessing it privately. You can ask your dermatologist if this is the right option for you.</p> <p><strong>6. Surgery</strong></p> <p>There is a procedure to cut certain nerves to the hands that stop them sweating. This is <a href="https://www.mdpi.com/2077-0383/11/3/786/pdf">highly effective</a> but can cause sweating to occur elsewhere.</p> <p>There are also other surgical options, which you can discuss with your doctor.</p> <p><strong>7. Microwave therapy</strong></p> <p>This is a <a href="https://www.tandfonline.com/doi/pdf/10.1080/09546634.2022.2089333">newer treatment</a> that zaps your sweat glands to destroy them so they can’t work any more. It’s not super common yet, and it is quite painful. It’s available privately in a few centres.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/239397/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><a href="https://theconversation.com/profiles/michael-freeman-223922"><em>Michael Freeman</em></a><em>, Associate Professor of Dermatology, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/7-things-you-can-do-if-you-think-you-sweat-too-much-239397">original article</a>.</em></p>

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Forget Bob Geldof: this is why you don’t like Mondays

<p><em><a href="https://theconversation.com/profiles/leon-lack-1142">Leon Lack</a>, <a href="https://theconversation.com/institutions/flinders-university-972">Flinders University</a></em></p> <p>Feeling sluggish? Grouchy even? Difficulties getting out of bed? Mondayitis can happen to the best of us. But rest assured: it’s a phenomenon science can actually explain.</p> <p>In fact, there are a range of explanations: perhaps you hate your job and/or are bullied at work; or maybe you <a href="http://www.youtube.com/watch?v=wmin5WkOuPw">live it large at the weekends</a> and come down with a crash on Mondays.</p> <p>But perhaps the most common cause involves our body clock – i.e. our circadian rhythms – and how our weekend sleeping habits throw our normal rhythms out of whack.</p> <h2>Blue Monday</h2> <p>As Sally Ferguson of the University of South Australia explained in <a href="https://theconversation.com/keeping-time-how-our-circadian-rhythms-drive-us-17">a recent article for The Conversation</a>, your circadian rhythm is your “natural pacemaker”. It controls a range of bodily cycles including the 24-hour cycle that regulates your degree of alertness at various times of day.</p> <p>Normally, our rhythm helps sustain our wakefulness until the end of the day and sustain our sleep until we’re ready to arise in the morning.</p> <figure class="align-center "><img src="https://images.theconversation.com/files/1062/original/mondayitis.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/1062/original/mondayitis.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=291&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/1062/original/mondayitis.jpg?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=291&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/1062/original/mondayitis.jpg?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=291&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/1062/original/mondayitis.jpg?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=365&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/1062/original/mondayitis.jpg?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=365&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/1062/original/mondayitis.jpg?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=365&amp;fit=crop&amp;dpr=3 2262w" alt="" /><figcaption><span class="caption">Image courtesy of Leon Lack.</span></figcaption></figure> <p>The above image shows how the normally-timed circadian “bed” (approximately 11pm to 7am) is surrounded by periods of low sleepiness (or alertness): this is also known as the “sleep forbidden zone” and the “wake-up zone”.</p> <p>In both, your body “wants” you to be awake: in the “sleep forbidden zone” you’ll find it hard to get to sleep, and in the “wake-up zone”, your body will “try” to wake you up.</p> <p>If the timing of your body clock changes – by partying till the wee hours, for example – these two zones can shift, making it harder to get to sleep at certain hours.</p> <p>In practice, this means that if you stay up a couple of hours later than normal one night, the “sleep forbidden zone” will drift to between 8pm and midnight, making it very difficult to get to sleep until after midnight.</p> <p>If this drifting occurs when it is necessary to get up early – e.g. on weekdays – you’ll lose sleep and be tired the next day.</p> <p>If this happens most days of the week, you’ll build up a sleep debt over the week that you will probably want to “pay off” when you have the opportunity to do so – on the weekend for most of us.</p> <h2>Sleep-in, and pay the price</h2> <p>How do you catch up on sleep on the weekend? You could go to bed earlier on Friday or Saturday night or you could sleep in later on Saturday and Sunday mornings. Ah, the luxury of the weekend sleep-in! Isn’t that what weekends are for?</p> <p>Unfortunately, though, that long-awaited weekend lie-in can cause problems come Monday.</p> <p>By sleeping in, you actively delay your body clock <em>again</em>, which can make it hard to get to sleep on Sunday night and leave you not feeling properly awake until later on Monday morning.</p> <h2>I don’t like Mondays (tell me why!)</h2> <p>Thanks to your weekend lie-in(s), your circadian rhythms have drifted away from their normal position and so, when that alarm clock starts bleating, you’re still at your lowest body temperature (see image above).</p> <p>You are expected to be up and out into the world while still in your “circadian bed”.</p> <p>Sure, you’ll probably feel better by noon with the help of the circadian “wake-up zone” (and maybe a stiff coffee or two) but the bad start to Monday has put you behind and you spend the rest of the week in catch-up mode.</p> <p>This vicious cycle is a problem for many, particularly <a href="http://en.wikipedia.org/wiki/Night_owl_(person)">“night owls”</a> whose rhythms are delayed even more than normal.</p> <p>So what can be done?</p> <p>Minimising the number of late bedtimes you have is a good start, as this will reduce your need for catch-up sleep.</p> <p>And if you do need to have catch-up sleep on the weekend, don’t sleep in late: get up about the same time you normally would and, if you need it, have a siesta instead.</p> <p>You’ll feel better for it come Monday morning.</p> <p><em><a href="https://theconversation.com/profiles/leon-lack-1142">Leon Lack</a>, Professor of Psychology, <a href="https://theconversation.com/institutions/flinders-university-972">Flinders University</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/forget-bob-geldof-this-is-why-you-dont-like-mondays-828">original article</a>.</em></p>

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What is methanol? How does it get into drinks and cause harm?

<p><em><a href="https://theconversation.com/profiles/ian-musgrave-1808">Ian Musgrave</a>, <a href="https://theconversation.com/institutions/university-of-adelaide-1119">University of Adelaide</a></em></p> <p>Melbourne teenager Bianca Jones <a href="https://www.abc.net.au/news/2024-11-21/bianca-jones-dead-laos-methanol-poisoning/104630384">has died</a> and her friend Holly Bowles remains severely ill in hospital in Thailand, after experiencing suspected methanol poisoning while they were travelling in Laos.</p> <p>The pair are reportedly among <a href="https://x.com/Smartraveller/status/1858850858227954118">several foreign nationals</a> who became ill after unknowingly consuming alcoholic drinks containing methanol in the south-east Asian country.</p> <p>So what is methanol, and how does it make people sick?</p> <h2>Methanol versus ethanol</h2> <p><a href="https://en.wikipedia.org/wiki/Methanol">Methanol</a> is an <a href="https://en.wikipedia.org/wiki/Alcohol_(chemistry)">alcohol</a>, like the familiar <a href="https://en.wikipedia.org/wiki/Ethanol">ethanol</a> we consume in alcoholic beverages.</p> <p>Like ethanol, methanol is a colourless, flammable liquid. It has a smell similar to ethanol as well.</p> <p>But the two have different chemical structures. Methanol is composed of only one carbon atom, while ethanol has two.</p> <figure class="align-center "><img src="https://images.theconversation.com/files/633188/original/file-20241120-15-i7wr12.png?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/633188/original/file-20241120-15-i7wr12.png?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=300&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/633188/original/file-20241120-15-i7wr12.png?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=300&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/633188/original/file-20241120-15-i7wr12.png?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=300&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/633188/original/file-20241120-15-i7wr12.png?ixlib=rb-4.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=377&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/633188/original/file-20241120-15-i7wr12.png?ixlib=rb-4.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=377&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/633188/original/file-20241120-15-i7wr12.png?ixlib=rb-4.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=377&amp;fit=crop&amp;dpr=3 2262w" alt="Models of methanol and ethanol depicted with balls and sticks." /><figcaption><span class="caption">Methanol (left) and ethanol (right) have differing chemical structures.</span> <span class="attribution"><span class="source">Wikimedia Commons</span>, <a class="license" href="http://creativecommons.org/licenses/by/4.0/">CC BY</a></span></figcaption></figure> <p>That one carbon atom makes all the difference. It means methanol is processed differently in our bodies and is much more toxic than ethanol.</p> <p>Methanol is used in a <a href="https://pubchem.ncbi.nlm.nih.gov/compound/Methanol">variety of industrial and household products</a>, such as windshield cleaning fluids, antifreeze and fuel. It’s not safe for human consumption.</p> <h2>What makes methanol toxic?</h2> <p>The difference is in how methanol is metabolised, or broken down in our bodies.</p> <p>Ethanol is metabolised into a chemical compound called acetaldehyde. Acetaldehyde is toxic, but is rapidly converted to acetate (also known as acetic acid, found in vinegar). Generating an acid may sound bad, but acetate actually <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6699882/">produces energy and makes important molecules</a> in the body.</p> <p>By contrast, methanol is metabolised into <a href="https://www.cancer.gov/about-cancer/causes-prevention/risk/substances/formaldehyde">formaldehyde</a> (a chemical used in <a href="https://www.safework.nsw.gov.au/hazards-a-z/hazardous-chemical/priority-chemicals/formaldehyde">industrial glues</a> and for embalming corpses, for example) and then to <a href="https://pubchem.ncbi.nlm.nih.gov/compound/Formic-Acid">formic acid</a> (the chemical in some ant bites that makes them hurt so much).</p> <p>Unlike acetate, which the body uses, formic acid <a href="https://pubmed.ncbi.nlm.nih.gov/1665561/">poisons the mitochondria</a>, the powerhouses of the cells.</p> <p>As a result, a person exposed to methanol can go into severe <a href="https://www.ncbi.nlm.nih.gov/books/NBK482121/">metabolic acidosis</a>, which is when too much acid builds up in the body.</p> <p>Methanol poisoning can cause nausea, vomiting, and abdominal pain. The acidosis then causes depression of the central nervous system which can cause people with methanol poisoning to fall unconscious and go into a coma, as well as retinal damage leading to vision loss. This is because the retinas are full of active mitochondria and sensitive to them being damaged.</p> <p>Death is not inevitable if only a small amount of methanol has been consumed, and rapid treatment will greatly reduce damage.</p> <p>However, permanent vision damage can occur even at <a href="https://www.ncbi.nlm.nih.gov/books/NBK482121/">non-lethal doses</a> if treatment is not administered quickly.</p> <h2>What does treatment involve?</h2> <p><a href="https://www.ncbi.nlm.nih.gov/books/NBK482121/">Treatment</a> is mainly supportive care, such as intubation and mechanical ventilation to help the patient to breathe.</p> <p>But it can also involve drugs such as <a href="https://go.drugbank.com/drugs/DB01213">fomepizole</a> (which inhibits the generation of toxic formic acid) and dialysis to remove methanol and its metabolites from the body.</p> <h2>How does methanol get into alcoholic drinks?</h2> <p>Methanol can turn up in any alcoholic beverage, but it’s most likely in beverages with higher alcohol content, such as spirits, and traditionally brewed drinks, such as fruit wines.</p> <p>Methanol can get into alcoholic beverages in a number of ways. Sometimes it’s added <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8303512/">deliberately and illegally</a> during or after manufacturing as a cheaper way to increase the alcohol content in a drink.</p> <p><a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC5028366/">Traditional brewing methods</a> can also inadvertently generate methanol as well as ethanol and produce toxic levels of methanol depending on the microbes and the types of plant materials used in the fermentation process.</p> <p>We don’t yet know how the Australian teenagers came to be poisoned in this tragedy. But it is a good idea when travelling (particularly in areas with traditionally fremented drinks, such as south-east Asia, the Indian subcontinent and parts of Africa) to always be careful.</p> <p>The Australian government’s <a href="https://www.smartraveller.gov.au/before-you-go/safety/partying#methanol">Smartraveller website</a> advises that to avoid methanol poisoning you should be careful drinking cocktails and drinks made with spirits, drink only at reputable licensed premises and avoid home-made alcoholic drinks.</p> <p>Drinking only mass-produced commercial brews can be safer, though understandably people often want to try locally made drinks as part of their adventure.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/244151/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/ian-musgrave-1808">Ian Musgrave</a>, Senior lecturer in Pharmacology, <a href="https://theconversation.com/institutions/university-of-adelaide-1119">University of Adelaide</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/what-is-methanol-how-does-it-get-into-drinks-and-cause-harm-244151">original article</a>.</em></p>

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What causes the itch in mozzie bites? And why do some people get such a bad reaction?

<p><em><a href="https://theconversation.com/profiles/cameron-webb-6736">Cameron Webb</a>, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a></em></p> <p>Are you one of these people who loathes spending time outdoors at dusk as the weather warms and mosquitoes start biting?</p> <p>Female mosquitoes <a href="https://www.annualreviews.org/content/journals/10.1146/annurev-ento-120811-153618">need blood</a> to develop their eggs. Even though they take a tiny amount of our blood, they can leave us with itchy red lumps that can last days. And sometimes something worse.</p> <p>So why does our body react and itch after being bitten by a mosquito? And why are some people more affected than others?</p> <h2>What happens when a mosquito bites?</h2> <p>Mosquitoes are attracted to warm blooded animals, including us. They’re attracted to the <a href="https://www.cambridge.org/core/journals/bulletin-of-entomological-research/article/abs/role-of-carbon-dioxide-in-hostfinding-by-mosquitoes-diptera-culicidae-a-review/2506B86EF63852B2D02EC3FCEE1E3B8B">carbon dioxide</a> we exhale, our body temperatures and, most importantly, <a href="https://www.abc.net.au/news/2024-11-08/mosquitoes-climate-change-skin/104548122">the smell of our skin</a>.</p> <p>The <a href="https://www.cell.com/trends/parasitology/abstract/S1471-4922(21)00237-3">chemical cocktail</a> of odours from bacteria and sweat on our skin <a href="https://www.cell.com/current-biology/fulltext/S0960-9822(23)00532-8">sends out a signal</a> to hungry mosquitoes.</p> <p><a href="https://www.sciencedirect.com/science/article/pii/S2667114X21000522">Some people’s</a> skin smells more appealing to mosquitoes, and they’re more likely to be bitten than others.</p> <p>Once the mosquito has made its way to your skin, things get a little gross.</p> <p>The mosquito pierces your skin with their “proboscis”, their feeding mouth part. But the proboscis isn’t a single, straight, needle-like tube. There are multiple tubes, <a href="https://www.npr.org/sections/health-shots/2016/06/07/480653821/watch-mosquitoes-use-6-needles-to-suck-your-blood">some designed</a> for sucking and some for spitting.</p> <p>Once their mouth parts have been inserted into your skin, the mosquito will inject some saliva. This contains a mix of chemicals that gets the blood flowing better.</p> <p>There has even been a suggestion that future medicines could be inspired by the <a href="https://www.sydney.edu.au/news-opinion/news/2018/03/29/mosquito-saliva-vital-to-the-discovery-of-future-drugs.html">anti-blood clotting properties</a> of mosquito saliva.</p> <p>It’s not the stabbing of our skin by the mosquito’s mouth parts that hurts, it’s the mozzie spit our bodies don’t like.</p> <h2>Are some people allergic to mosquito spit?</h2> <p>Once a mosquito has injected their saliva into our skin, a variety of reactions can follow. For the lucky few, nothing much happens at all.</p> <p>For most people, and irrespective of the type of mosquito biting, <a href="https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2022.1024559/full">there is some kind of reaction</a>. Typically there is <a href="https://www.sciencedirect.com/science/article/abs/pii/S0161589023002304?via%3Dihub">redness and swelling of the skin</a> that appears within a few hours, but often more quickly, after just a few minutes.</p> <p>Occasionally, the reaction can cause pain or discomfort. Then comes the <a href="https://www.abc.net.au/news/health/2023-01-20/mosquito-bites-itchy-calamine-heat-ice-antihistamine-toothpaste/101652608">itchiness</a>.</p> <p>Some people do suffer severe reactions to mosquito bites. It’s a condition often referred to as “<a href="https://www.webmd.com/allergies/what-is-skeeter-syndrome">skeeter syndrome</a>” and is an allergic reaction caused by the protein in the mosquito’s saliva. This can cause large areas of swelling, blistering and fever.</p> <p>The chemistry of mosquito spit hasn’t really been well studied. But it has been shown that, for those who do suffer allergic reactions to their bites, the <a href="https://www.sciencedirect.com/science/article/abs/pii/S0091674904022183">reactions may differ</a> depending on the type of mosquito biting.</p> <p>We all probably get more tolerant of mosquito bites as we get older. Young children are certainly more likely to suffer more following mosquito bites. But as we get older, the reactions are less severe and may pass quickly without too much notice.</p> <h2>How best to treat the bites?</h2> <p>Research into treating bites <a href="https://linkinghub.elsevier.com/retrieve/pii/S0161589023002304">has yet to provide</a> a single easy solution.</p> <p>There are many <a href="https://www.healthline.com/health/outdoor-health/home-remedies-for-mosquito-bites">myths and home remedies</a> about what works. But there is little scientific evidence supporting their use.</p> <p>The best way to treat mosquito bites is by applying a cold pack to reduce swelling and to keep the skin clean to avoid any secondary infections. Antiseptic creams and lotions may also help.</p> <p>There is some evidence that <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC10309056/">heat may alleviate</a> some of the discomfort.</p> <p>It’s particularly tough to keep young children from scratching at the bite and breaking the skin. This can form a nasty scab that may end up being worse than the bite itself.</p> <p>Applying an anti-itch cream may help. If the reactions are severe, <a href="https://www.healthdirect.gov.au/insect-bites-and-stings">antihistamine medications</a> may be required.</p> <h2>To save the scratching, stop the bites</h2> <p>Of course, it’s better not to be bitten by mosquitoes in the first place. Topical <a href="https://theconversation.com/insect-repellents-work-but-there-are-other-ways-to-beat-mosquitoes-without-getting-sticky-171805">insect repellents</a> are a safe, effective and affordable way to reduce mosquito bites.</p> <p>Covering up with loose fitted long sleeved shirts, long pants and covered shoes also provides a physical barrier.</p> <p><a href="https://theconversation.com/are-mosquito-coils-good-or-bad-for-our-health-88548">Mosquito coils and other devices</a> can also assist, but should not be entirely relied on to stop bites.</p> <p>There’s another important reason to avoid mosquito bites: millions of people around the world suffer from mosquito-borne diseases. More than <a href="https://www.who.int/news-room/fact-sheets/detail/malaria">half a million people die</a> from malaria each year.</p> <p>In Australia, <a href="https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1005070">Ross River virus</a> infects more than 5,000 people every year. And in recent years, there have been cases of serious illnesses caused by <a href="https://www.science.org/content/article/how-rains-pigs-and-waterbirds-fueled-shocking-disease-outbreak-australia">Japanese encephalitis</a> and <a href="https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2023.1256149/full">Murray Valley encephalitis</a> viruses.</p> <p><em><a href="https://theconversation.com/profiles/cameron-webb-6736">Cameron Webb</a>, Clinical Associate Professor and Principal Hospital Scientist, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/what-causes-the-itch-in-mozzie-bites-and-why-do-some-people-get-such-a-bad-reaction-243044">original article</a>.</em></p>

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New study suggests weight loss drugs like Ozempic could help with knee pain. Here’s why there may be a link

<p><em><a href="https://theconversation.com/profiles/giovanni-e-ferreira-1030477">Giovanni E. Ferreira</a>, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a> and <a href="https://theconversation.com/profiles/christina-abdel-shaheed-425241">Christina Abdel Shaheed</a>, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a></em></p> <p>The drug semaglutide, commonly known by the brand names Ozempic or Wegovy, was <a href="https://theconversation.com/the-rise-of-ozempic-how-surprise-discoveries-and-lizard-venom-led-to-a-new-class-of-weight-loss-drugs-219721">originally developed</a> to help people with type 2 diabetes manage their blood sugar levels.</p> <p>However, researchers have discovered it may help with other health issues, too. Clinical trials show semaglutide can be effective for <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa2032183">weight loss</a>, and hundreds of thousands of people around the world are using it <a href="https://theconversation.com/considering-taking-a-weight-loss-drug-like-ozempic-here-are-some-potential-risks-and-benefits-219312">for this purpose</a>.</p> <p>Evidence has also shown the drug can help manage <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa2306963">heart failure</a> and <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa2403347">chronic kidney disease</a> in people with obesity and type 2 diabetes.</p> <p>Now, a study published in the <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa2403664">New England Journal of Medicine</a> has suggested semaglutide can improve knee pain in people with obesity and osteoarthritis. So what did this study find, and how could semaglutide and osteoarthritis pain be linked?</p> <h2>Osteoarthritis and obesity</h2> <p>Osteoarthritis is a common joint disease, affecting <a href="https://www.aihw.gov.au/reports/chronic-musculoskeletal-conditions/osteoarthritis">2.1 million Australians</a>. Most people with osteoarthritis <a href="https://theconversation.com/do-you-have-knee-pain-from-osteoarthritis-you-might-not-need-surgery-heres-what-to-try-instead-236779">have pain</a> and find it difficult to perform common daily activities such as walking. The knee is <a href="https://pubmed.ncbi.nlm.nih.gov/37675071/">the joint most commonly affected</a> by osteoarthritis.</p> <p>Being overweight or obese is a <a href="https://pubmed.ncbi.nlm.nih.gov/25447976/">major risk factor</a> for osteoarthritis in the knee. The link between the two conditions <a href="https://pubmed.ncbi.nlm.nih.gov/26821091/">is complex</a>. It involves a combination of increased load on the knee, <a href="https://www.nature.com/articles/s41413-023-00301-9">metabolic factors</a> such as high cholesterol and high blood sugar, and inflammation.</p> <p>For example, elevated blood sugar levels increase the production of inflammatory molecules in the body, which can damage the cartilage in the knee, and lead to the <a href="https://pubmed.ncbi.nlm.nih.gov/30712918/">development of osteoarthritis</a>.</p> <p>Weight loss is strongly recommended to reduce the pain of knee osteoarthritis in people who are overweight or obese. <a href="https://pubmed.ncbi.nlm.nih.gov/31908149/">International</a> and <a href="https://www.safetyandquality.gov.au/sites/default/files/2024-08/osteoarthritis-knee-clinical-care-standard-2024.pdf">Australian guidelines</a> suggest losing as little as 5% of body weight can help.</p> <p>But losing weight with just diet and exercise can be difficult for many people. <a href="https://pubmed.ncbi.nlm.nih.gov/26180980/">One study</a> from the United Kingdom found the annual probability of people with obesity losing 5% or more of their body weight was less than one in ten.</p> <p>Semaglutide has recently entered the market as a potential alternative route to weight loss. It comes from a class of drugs known as GLP-1 receptor agonists and works by increasing a person’s sense of fullness.</p> <h2>Semaglutide for osteoarthritis?</h2> <p>The rationale for the <a href="https://www.nejm.org/doi/full/10.1056/NEJMoa2403664">recent study</a> was that while we know weight loss alleviates symptoms of knee osteoarthritis, the effect of GLP-1 receptor agonists was yet to be explored. So the researchers set out to understand what effect semaglutide might have on knee osteoarthritis pain, alongside body weight.</p> <p>They randomly allocated 407 people with obesity and moderate osteoarthritis into one of two groups. One group received semaglutide once a week, while the other group received a placebo. Both groups were treated for 68 weeks and received counselling on diet and physical activity. At the end of the treatment phase, researchers measured changes in knee pain, function, and body weight.</p> <p>As expected, those taking semaglutide lost more weight than those in the placebo group. People on semaglutide lost around 13% of their body weight on average, while those taking the placebo lost around 3% on average. More than 70% of people in the semaglutide group lost at least 10% of their body weight compared to just over 9% of people in the placebo group.</p> <p>The study found semaglutide reduced knee pain significantly more than the placebo. Participants who took semaglutide reported an additional 14-point reduction in pain on a 0–100 scale compared to the placebo group.</p> <p>This is much greater than the pain reduction in another <a href="https://pubmed.ncbi.nlm.nih.gov/36511925/">recent study</a> among people with obesity and knee osteoarthritis. This study investigated the effects of a diet and exercise program compared to an attention control (where participants are provided with information about nutrition and physical activity). The results here saw only a 3-point difference between the intervention group and the control group on the same scale.</p> <p>The amount of pain relief reported in the semaglutide trial is also larger than that reported with commonly used pain medicines such as <a href="https://pubmed.ncbi.nlm.nih.gov/35442752/">anti-inflammatories</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/35137418/">opioids</a> and <a href="https://www.bmj.com/content/372/bmj.m4825">antidepressants</a>.</p> <p>Semaglutide also improved knee function compared to the placebo. For example, people who took semaglutide could walk about 42 meters further than those on the placebo in a six-minute walking test.</p> <h2>How could semaglutide reduce knee pain?</h2> <p>It’s not fully clear how semaglutide helps with knee pain from osteoarthritis. One explanation may be that when a person loses weight, there’s less stress on the joints, which reduces pain.</p> <p>But recent studies have also suggested semaglutide and other GLP-1 receptor agonists might have <a href="https://www.sciencedirect.com/science/article/pii/S1043661822002651">anti-inflammatory</a> properties, and could even protect against <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6731440/">cartilage wear and tear</a>.</p> <p>While the results of this new study are promising, it’s too soon to regard semaglutide as a “miracle drug” for knee osteoarthritis. And as this study was funded by the drug company that makes semaglutide, it will be important to have independent studies in the future, to confirm the findings, or not.</p> <p>The study also had strict criteria, excluding some groups, such as those taking opioids for knee pain. One in seven Australians seeing a GP for their knee osteoarthritis <a href="https://pubmed.ncbi.nlm.nih.gov/34527976/">are prescribed opioids</a>. Most participants in the trial were white (61%) and women (82%). This means the study may not fully represent the average person with knee osteoarthritis and obesity.</p> <p>It’s also important to consider semaglutide can have a range of <a href="https://theconversation.com/considering-taking-a-weight-loss-drug-like-ozempic-here-are-some-potential-risks-and-benefits-219312">side effects</a>, including gastrointestinal symptoms and fatigue.</p> <p>There are some concerns that semaglutide could reduce <a href="https://www.sciencealert.com/experts-are-concerned-drugs-like-ozempic-may-cause-muscle-loss">muscle mass</a> and <a href="https://www.healthline.com/health-news/ozempic-muscle-mass-loss">bone density</a>, though we’re still learning more about this.</p> <p>Further, it can be difficult to access.</p> <h2>I have knee osteoarthritis, what should I do?</h2> <p>Osteoarthritis is a disease caused by multiple factors, and it’s important to take <a href="https://www.safetyandquality.gov.au/standards/clinical-care-standards/osteoarthritis-knee-clinical-care-standard/information-consumers-osteoarthritis-knee-clinical-care-standard">a multifaceted approach</a> to managing it. Weight loss is an important component for those who are overweight or obese, but so are other aspects of <a href="https://theconversation.com/do-you-have-knee-pain-from-osteoarthritis-you-might-not-need-surgery-heres-what-to-try-instead-236779">self-management</a>. This might include physical activity, pacing strategies, and other positive lifestyle changes such as improving sleep, healthy eating, and so on.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/243159/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/giovanni-e-ferreira-1030477">Giovanni E. Ferreira</a>, NHMRC Emerging Leader Research Fellow, Institute of Musculoskeletal Health, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a> and <a href="https://theconversation.com/profiles/christina-abdel-shaheed-425241">Christina Abdel Shaheed</a>, Associate Professor, School of Public Health, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a></em></p> <p><em>Image credits: Shutterstocl</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/new-study-suggests-weight-loss-drugs-like-ozempic-could-help-with-knee-pain-heres-why-there-may-be-a-link-243159">original article</a>.</em></p>

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Balance declines with age, but exercise can help stave off some of the risk of falling

<p><em><a href="https://theconversation.com/profiles/evan-papa-1433146">Evan Papa</a>, <a href="https://theconversation.com/institutions/tufts-university-1024">Tufts University</a></em></p> <p>My wife and I were in the grocery store recently when we noticed an older woman reaching above her head for some produce. As she stretched out her hand, she lost her balance and began falling forward. Fortunately, she leaned into her grocery cart, which prevented her from falling to the ground.</p> <p>Each year, about <a href="https://www.cdc.gov/mmwr/volumes/65/wr/mm6537a2.htm">1 in every 4 older adults experience a fall</a>. In fact, falls are the leading cause of injuries in adults ages 65 and older. Falls are the <a href="https://doi.org/10.1007/bf00298717">most common cause of hip fractures</a> and <a href="https://doi.org/10.1111/j.1553-2712.2000.tb00515.x">traumatic brain injuries</a>.</p> <p>Injuries like those are also <a href="https://doi.org/10.1056/NEJM199710303371806">risk factors for placement in a nursing home</a>, where the fall risk is <a href="https://doi.org/10.7326/0003-4819-121-6-199409150-00009">nearly three times higher than for people living in the community</a>.</p> <p>A number of physical changes with aging often go unseen preceding falls, including muscle weakness, decreased balance and changes in vision.</p> <p>I am a <a href="https://facultyprofiles.tufts.edu/evan-papa">physical therapist</a> and <a href="https://scholar.google.com/citations?user=T9B_dHQAAAAJ&amp;hl=en">clinical scientist focused on fall prevention</a> in older adults, commonly ages 65 and older. I’ve spent most of my career investigating why older adults fall and working with patients and their families to prevent falls.</p> <h2>Why aging leads to increased risk of falls</h2> <p>Aging is a process that affects the systems and tissues of every person. The rate and magnitude of aging may be different for each person, but overall physical decline is an inevitable part of life. Most people think aging starts in their 60s, but in fact we spend most of our life span <a href="https://doi.org/10.1093%2Fgeront%2Fgnv130">undergoing the process of decline</a>, typically beginning in our 30s.</p> <p>Older adults are more prone to falling for various reasons, including age-related changes in their bodies and vision changes that leave them vulnerable to environmental factors such as curbs, stairs and carpet folds.</p> <figure><iframe src="https://www.youtube.com/embed/ztPbKP68P2Q?wmode=transparent&amp;start=24" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe><figcaption><span class="caption">Some straightforward measures to improve the safety of the home environment for older adults can significantly lower the risk of falls.</span></figcaption></figure> <p>Based on my experience, here are some common reasons older adults may experience falls:</p> <p>First, <a href="https://my.clevelandclinic.org/health/diseases/23167-sarcopenia">aging leads to a natural loss of muscle strength</a> and flexibility, making it more challenging to maintain balance and stability. The loss of strength and poor balance are two of the most common causes of falls.</p> <p>Second, older adults often have chronic conditions such as arthritis, Parkinson’s disease or diabetes that can affect their mobility, coordination and overall stability.</p> <p>In addition, certain medications commonly taken by older adults, <a href="https://doi.org/10.4088/jcp.18f12340">such as sedatives</a> or <a href="https://doi.org/10.1001/jamainternmed.2013.14764">blood pressure drugs</a>, can cause dizziness, drowsiness or a drop in blood pressure, leading to an increased risk of falls.</p> <p>Age-related vision changes, such as reduced depth perception and peripheral vision and difficulty in differentiating colors or contrasts, can make it harder to navigate and identify potential hazards. Hazards in the environment, such as uneven surfaces, slippery floors, inadequate lighting, loose rugs or carpets or cluttered pathways, can <a href="https://doi.org/10.1186/s12877-021-02499-x">significantly contribute to falls among older adults</a>.</p> <p>Older adults who lead a sedentary lifestyle or have limited physical activity may also experience reduced strength, flexibility and balance.</p> <p>And finally, such conditions as dementia or Alzheimer’s disease can affect judgment, attention and spatial awareness, leading to increased fall risk.</p> <h2>Theories of aging</h2> <p>There are numerous theories about why we age but there is no one unifying notion that explains all the changes in our bodies. A large portion of aging-related decline is <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3295054/">caused by our genes</a>, which determine the structure and function of bones, muscle growth and repair and visual depth perception, among other things. But there are also numerous lifestyle-related factors that influence our rate of aging including diet, exercise, stress and exposure to environmental toxins.</p> <p>A recent advance in scientific understanding of aging is that there is a difference between your <a href="https://theconversation.com/are-you-a-rapid-ager-biological-age-is-a-better-health-indicator-than-the-number-of-years-youve-lived-but-its-tricky-to-measure-198849">chronological age and your biological age</a>. Chronological age is simply the number of years you’ve been on the Earth. Biological age, however, refers to how old your cells and tissues are. It is based on physiological evidence from a blood test and is related to your physical and functional ability. Thus, if you’re healthy and fit, your biological age may be lower than your chronological age. However, the reverse can also be true.</p> <p>I encourage patients to focus on their biological age because it empowers them to take control over the aging process. We obviously have no control over when we are born. By focusing on the age of our cells, we can avoid long-held beliefs that our bodies are destined to develop cancer, diabetes or other conditions that <a href="https://doi.org/10.1016/j.cub.2012.07.024">have historically been tied to how long we live</a>.</p> <p>And by taking control of diet, exercise, sleep and other lifestyle factors you can actually <a href="https://doi.org/10.1111%2Facel.13538">decrease your biological age</a> and improve your quality of life. As one example, our team’s research has shown that moderate amounts of aerobic exercise <a href="https://doi.org/10.1371/journal.pone.0188538">can slow down motor decline</a> even when a person begins exercise in the latter half of the life span.</p> <h2>Fall prevention</h2> <p>Adopting lifestyle changes such as regular, long-term exercise can <a href="https://doi.org/10.1001/jamainternmed.2018.5406">reduce the consequences of aging</a>, including falls and injuries. Following a healthy diet, managing chronic conditions, reviewing medications with health care professionals, maintaining a safe home environment and getting regular vision checkups can also help reduce the risk of falls in older adults.</p> <p>There are several exercises that physical therapists use to improve balance for patients. It is important to note however, that before starting any exercise program, everyone should consult with a health care professional or a qualified physical therapist to determine the most appropriate exercises for their specific needs. Here are five forms of exercise I commonly recommend to my patients to improve balance:</p> <ol> <li> <p>Balance training can help improve coordination and <a href="https://www.sciencedirect.com/topics/neuroscience/proprioception">proprioception</a>, which is the body’s ability to sense where it is in space. By practicing movements that challenge the body’s balance, such as standing on one leg or walking heel-to-toe, the nervous system becomes better at coordinating movement and maintaining balance. A large research study analyzing nearly 8,000 older adults found that balance and functional exercises <a href="https://doi.org/10.1002/14651858.cd012424.pub2">reduce the rate of falls by 24%</a>.</p> </li> <li> <p>Strength training exercises involve lifting weights or using resistance bands to increase muscle strength and power. By strengthening the muscles in the legs, hips and core, older adults can improve their ability to maintain balance and stability. Our research has shown that strength training can also lead to <a href="https://doi.org/10.2147/cia.s104674">improvements in walking speed and a reduction in fall risk</a>.</p> </li> <li> <p>Tai chi is a gentle martial art that focuses on slow, controlled movements and shifting body weight. Research shows that it can improve balance, strength and flexibility in older adults. Several combined studies in tai chi have demonstrated a 20% reduction in the <a href="https://doi.org/10.1002/14651858.cd012424.pub2">number of people who experience falls</a>.</p> </li> <li> <p>Certain yoga poses can enhance balance and stability. Tree pose, warrior pose and mountain pose are examples of poses that can help improve balance. It’s best to <a href="https://theconversation.com/yoga-modern-research-shows-a-variety-of-benefits-to-both-body-and-mind-from-the-ancient-practice-197662">practice yoga</a> under the guidance of a qualified instructor who can adapt the poses to individual abilities.</p> </li> <li> <p>Flexibility training involves stretching the muscles and joints, which can improve range of motion and reduce stiffness. By improving range of motion, <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3990889/">older adults can improve their ability to move safely</a> and avoid falls caused by limitations in mobility.</p> </li> <li> <p>Use of assistive devices can be helpful when strength or balance impairments are present. Research studies involving the evaluation of canes and walkers used by older adults confirm that <a href="https://doi.org/10.1016/j.apmr.2004.04.023">these devices can improve balance and mobility</a>. Training from a physical or occupational therapist in the proper use of assistive devices is an important part of improving safety.</p> </li> </ol> <p>When I think back about the woman who nearly fell in the grocery store, I wish I could share everything we have learned about healthy aging with her. There’s no way to know if she was already putting these tips into practice, but I’m comforted by the thought that she may have avoided the fall by being in the right place at the right time. After all, she was standing in the produce aisle.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/204174/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/evan-papa-1433146">Evan Papa</a>, Associate Professor of Physical Therapy and Rehabilitation Science, <a href="https://theconversation.com/institutions/tufts-university-1024">Tufts University</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/balance-declines-with-age-but-exercise-can-help-stave-off-some-of-the-risk-of-falling-204174">original article</a>.</em></p>

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Readers response: What’s the best advice you’ve received on staying healthy as you age?

<p>We asked our readers what the best advice they’ve received on staying healthy as you age is, and the response was overwhelming. Here's what they said. </p> <p><strong>Fred Pilcher </strong>- Don't smoke. That's the most important advice you're likely to get. If you do smoke, quit now. Today. I've lost parents and friends to lung cancer and emphysema - both terrible ways to go. (I say this as a former two pack a day addict.)</p> <p><strong>Kate Caddey</strong> - Stay as fit as you can. Walk, do the stretch, balance and dance offerings. Travel the slightly harder way with ups and downs included. Stay curious about people you meet and about everything in general. Never stop learning.</p> <p><strong>Marie Jones</strong> - Keep laughing.</p> <p><strong>Gloria Hickey</strong> - Keep active, but wish I had been told to have my B12 added to yearly blood work too. </p> <p><strong>Peter Connolly</strong> - Best advice I got was "Whatever you do, go out with a bang. There is absolutely no point in lying in bed in a hospital, dying of nothing!"</p> <p><strong>Terry Dolman</strong> - Enjoy being happy. It takes more energy to be grumpy than smile. Plus, a good Friend in Vietnam now said "don't carry the past plus a drink of whisky a day." </p> <p><strong>Heather Dixon</strong> - Keep busy.</p> <p><strong>Lydia Poli </strong>- Enjoy the ride while you can!</p> <p><strong>Marlene Cochrane</strong> - Don't stop moving. Both physically and mentally.</p> <p><strong>Karen Ambrose</strong> - Keep dancing!</p> <p><em>Image credits: Shutterstock </em></p>

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Menopause is having a moment. How a new generation of women are shaping cultural attitudes

<p><em><a href="https://theconversation.com/profiles/bridgette-glover-2232638">Bridgette Glover</a>, <a href="https://theconversation.com/institutions/university-of-new-england-919">University of New England</a></em></p> <p>From hot flashes to hysteria, <a href="https://rowman.com/ISBN/9780739170007/Periods-in-Pop-Culture-Menstruation-in-Film-and-Television">film and TV</a> have long represented menopause as scary, emotional and messy.</p> <p>Recently, celebrities have been sharing their personal menopause experiences on social media, helping to re-frame the conversation in popular culture.</p> <p>We are also seeing more stories about menopause on television, with real stories and depictions that show greater empathy for the person going through it.</p> <p>Menopause is having a moment. But will it help women?</p> <h2>The change onscreen</h2> <p>This is not what we’re used to seeing on our screens. Countless sitcoms, from All in the Family (1971–79) to Two and a Half Men (2003–15) have used the menopause madness trope for laughs.</p> <p>Retro sitcom That ‘70s Show (1998–2006) used mom Kitty’s menopause journey as comedic fodder for multiple episodes. When she mistakes a missed period for pregnancy, Kitty’s surprise menopause diagnosis results in an identity crisis alongside mood swings, hot flashes and irritability.</p> <p>But the audience is not meant to empathise. Instead, the focus is on how Kitty’s menopause impacts the men in her family. Having to navigate Kitty’s symptoms, her veteran husband likens the experience to war: “I haven’t been this frosty since Korea”.</p> <figure><iframe src="https://www.youtube.com/embed/mPLJBZiKV4U?wmode=transparent&amp;start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> <p>Even when male characters are not directly involved, women are determined to reject menopause because they see it as a marker of age that signals a loss of desirability and social worth. In Sex and the City (1998–2004), Samantha describes herself as “day-old bread” when she presumes her late period signifies menopause.</p> <p>This is a popular framing of menopause in <a href="https://www.tandfonline.com/doi/full/10.1080/14680777.2018.1409969">post-feminist TV</a> of the 1990s and early 2000s. While the <a href="https://www.tandfonline.com/doi/full/10.1080/14680777.2012.712373#d1e783">menstruating body</a> is constructed as uncontrollable and in need of management, the menopausal body requires management and maintenance to reject signals of collapse.</p> <p>These storylines erase the genuine experiences of confusion, discomfort and transformation that come with menopause.</p> <h2>A cultural moment arrives</h2> <p><a href="https://www.npr.org/sections/health-shots/2015/12/31/460726461/why-2015-was-the-year-of-the-period-and-we-dont-mean-punctuation">Since 2015</a>, stories of menstruation have increased in popular culture.</p> <p>Series like comedy Broad City (2014–19) and comedy-drama Better Things (2016–22) directly call out the lack of menopause representations. When Abbi in Broad City admits she “totally forgot about menopause”, a woman responds “Menopause isn’t represented in mainstream media. Like, no one wants to talk about it”.</p> <p>Similarly, in Better Things, while watching her three daughters stare at the TV Sam laments: “No one wants to hear about it, which is why nobody ever prepared you for it”.</p> <p>And lack of preparation becomes a key theme for perimenopausal Charlotte in the Sex and the City reboot, And Just Like That … (2021–) when she has a “flash period”.</p> <figure><iframe src="https://www.youtube.com/embed/9AmwXuHo-2w?wmode=transparent&amp;start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> <p>Fleabag (2016–19) included a groundbreaking monologue about menopause delivered by Kristen Scott-Thomas, playing a successful businesswoman. She describes menopause as “horrendous, but then it’s magnificent”.</p> <blockquote> <p>[…] your entire pelvic floor crumbles, and you get fucking hot, and no one cares. But then you’re free. No longer a slave. No longer a machine with parts.</p> </blockquote> <figure><iframe src="https://www.youtube.com/embed/RZrnHnASRV8?wmode=transparent&amp;start=13" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> <p>Scripted by Phoebe Waller-Bridge, this <a href="https://www.latimes.com/entertainment/la-et-menopause-20190524-story.html">celebrated</a> monologue critiques the post-feminist notion of striving to be the “<a href="https://www.tandfonline.com/doi/full/10.1080/14680777.2012.712373#d1e783">idealised feminine body</a>”. Through this new feminist lens, menopause is acknowledged as both painful – physically and emotionally – and necessary for liberation.</p> <h2>Today’s menopause on screen</h2> <p>Alongside more recent series like The Change (2023), multiple documentaries including <a href="https://www.tamsenfadal.com/the-m-factor">The (M) Factor</a> (2024), and <a href="https://theconversation.com/there-is-no-future-for-ageing-women-how-the-substance-uses-body-horror-in-a-feminist-critique-239729">arguably</a> even films like The Substance (2024), social media has become a prolific space for raising awareness about menopause.</p> <p>Celebrities use social media to share tales of perimenopause and menopause, often in real time.</p> <p>Last year, actor Drew Barrymore experienced her “first perimenopausal hot flash” during her talk show.</p> <p>And ABC News Breakfast guest host, Imogen Crump, had to pause her news segment, saying</p> <blockquote> <p>I could keep stumbling through, but I’m having such a perimenopausal hot flush right now, live on air.</p> </blockquote> <p>Both Barrymore and Crump shared clips of their live segments to their social media pages, to challenge stigma and create conversations. Crump even posted to <a href="https://www.linkedin.com/posts/imogen-crump-6b74b726_perimenopause-activity-7127788484861300736-mhHh/">LinkedIn</a> to raise awareness in a professional setting.</p> <p>In a podcast interview clip shared to Instagram, writer and skincare founder, Zoë Foster Blake describes perimenopause as a “real mental health thing”, because of the lack of awareness. Recalling conversations with other perimenopausal women, Foster Blake says “We all think we’re crazy. We don’t know what the fuck is going on”.</p> <p>Feeling “crazy” is a constant theme in these conversations. As actor and <a href="https://stripesbeauty.com/pages/founder-story">menopause awareness advocate</a> Naomi Watts points out, this is largely thanks to Hollywood. Despite the stigmatising media stereotype of “crazy lady that shouts”, <a href="https://www.youtube.com/watch?v=TQ3BN9rS_7g">Watts argues</a> that with “support and community”, women experiencing perimenopause and menopause “can thrive”.</p> <p>In fact, Watts believes menopause should be celebrated: “we know ourselves better, we’re wiser for our cumulative experiences”.</p> <p>Medical professionals like American doctors <a href="https://www.instagram.com/p/DBUCPW5OUTf/">Marie Clare Haver</a> and <a href="https://www.instagram.com/p/C7IfaHDgXMY/">Corinne Menn</a> have been well-positioned to share their expertise and experiences via social media. They are catching and helping fuel a wave of advocacy and awareness for midlife women’s health.</p> <h2>Building community</h2> <p>After watching the menopause madness trope on our screens for decades, we are now seeing perimenopause and menopause depicted with more empathy. These depictions allow viewers – those who menstruate, who have menstruated, and who know menstruators – to feel seen and be informed.</p> <p>By sharing their experiences on social media and adding to these new screen stories, celebrities are building a community that makes the menopausal journey less lonely and helps those on it remember their worth.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/241784/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/bridgette-glover-2232638">Bridgette Glover</a>, PhD Candidate in Media and Communications, <a href="https://theconversation.com/institutions/university-of-new-england-919">University of New England</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/menopause-is-having-a-moment-how-a-new-generation-of-women-are-shaping-cultural-attitudes-241784">original article</a>.</em></p>

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Hospice nurse shares what happens to the body after death

<p dir="ltr">A hospice nurse has revealed the reality of what happens to our bodies in the minutes, hours and days after we die. </p> <p dir="ltr">In her efforts to break down the taboo around conversations about death, Julie McFadden, a hospice nurse from the US, posts candid videos about death and dying to help us be more informed and prepared. </p> <p dir="ltr">In Julie’s latest video, she explains exactly what happens to the human body in the moments, hours and days after someone dies. </p> <p dir="ltr">Nurse Julie said that in the immediate moments after death, the body completely relaxes, beginning the first stage of decomposition, called hypostasis.</p> <p dir="ltr">“All of the things in your body that are holding fluids in, relaxes. That's why death can be messy sometimes.”</p> <p dir="ltr">She clarified that because of how relaxed the body becomes, those who have just died may urinate, have bowel movements or experience bodily fluids coming out of their nose, mouth, ears or eyes. </p> <p dir="ltr">Nurse Julie added, “I like to talk about it so people aren't surprised if that happens - very normal and to be expected sometimes.”</p> <p dir="ltr">This is also when the stage of decomposition called autolysis, or “the self-digestion” stage, occurs and enzymes begin to break down oxygen-deprived tissue, also causing the body temperature to drop. </p> <p dir="ltr">As the body settles in the hours after death, Nurse Julie said the blood will begin to pool downward toward the ground.</p> <p dir="ltr">She said, “If you let someone lie there for long enough - which we do sometimes; you don't have to hurry up and make sure your loved one leaves the house - if you turn them you will notice usually the back of their legs the whole backside of them will look purple or darker that's because all their blood is pulling down.”</p> <p dir="ltr">“Gravity is pulling it down. So they will eventually get a darker colour tone of skin on their backside.”</p> <p dir="ltr">One to two hours after death is also when rigor mortis - or the stiffening of a body’s muscles - sets in and continues for about the next 24 hours</p> <p dir="ltr">Nurse Julie said, “I have seen people become very stiff almost immediately - like a few minutes - after death and other people, their body takes longer.”</p> <p dir="ltr">Additionally, about 12 hours after death, the body will feel cool to the touch. </p> <p dir="ltr">About a day to a day and a half after a person dies, rigor mortis subsides and the body will begin to loosen again, as Nurse Julie said the body's tissues relax and cause the stiffness to break down.</p> <p dir="ltr">By this time, the body is usually in the mortuary, which will prepare the body in whichever way the family has requested, whether it is for burial or cremation. </p> <p dir="ltr">She added, “In a world where people didn't have access to a mortuary or a healthcare system and they just died naturally, our bodies are built to, after death, decompose.”</p> <p dir="ltr"><em>Image credits: Shutterstock / Instagram / YouTube</em></p>

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Fasting, eating earlier in the day or eating fewer meals – what works best for weight loss?

<p><em><a href="https://theconversation.com/profiles/hayley-oneill-1458016">Hayley O'Neill</a>, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> and <a href="https://theconversation.com/profiles/loai-albarqouni-452476">Loai Albarqouni</a>, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a></em></p> <p>Globally, <a href="https://www.who.int/news-room/fact-sheets/detail/obesity-and-overweight">one in eight people</a> are living with obesity. This is an issue because <a href="https://www.aihw.gov.au/reports/risk-factors/risk-factors-to-health/contents/overweight-and-obesity">excess fat</a> <a href="https://pubmed.ncbi.nlm.nih.gov/27423262/">increases the risk</a> of type 2 diabetes, heart disease and certain cancers.</p> <p><a href="https://pubmed.ncbi.nlm.nih.gov/33393504/">Modifying your diet</a> is important for managing obesity and preventing weight gain. This might include reducing your calorie intake, changing your <a href="https://pubmed.ncbi.nlm.nih.gov/39143663/">eating patterns</a> and prioritising healthy food.</p> <p>But is one formula for weight loss more likely to result in success than another? Our <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC11530941/">new research</a> compared three weight-loss methods, to see if one delivered more weight loss than the others:</p> <ul> <li>altering calorie distribution – eating more calories earlier rather than later in the day</li> <li>eating fewer meals</li> <li>intermittent fasting.</li> </ul> <p>We analysed data from 29 clinical trials involving almost 2,500 people.</p> <p>We found that over 12 weeks or more, the three methods resulted in similar weight loss: 1.4–1.8kg.</p> <p>So if you do want to lose weight, choose a method that works best for you and your lifestyle.</p> <h2>Eating earlier in the day</h2> <p>When our metabolism <a href="https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/metabolic-syndrome">isn’t functioning properly</a>, our body can’t respond to the hormone insulin properly. This can lead to weight gain, fatigue and can increase the risk of a number of chronic diseases such as diabetes.</p> <p>Eating later in the day – with a <a href="https://pubmed.ncbi.nlm.nih.gov/23512957/">heavy dinner</a> and late-night snacking – seems to lead to <a href="https://pubmed.ncbi.nlm.nih.gov/33172509/">worse metabolic function</a>. This means the body becomes less efficient at converting food into energy, managing blood sugar and regulating fat storage.</p> <p>In contrast, consuming calories <a href="https://pubmed.ncbi.nlm.nih.gov/31151228/">earlier</a> in the day appears to <a href="https://pubmed.ncbi.nlm.nih.gov/29754952/">improve</a> metabolic function.</p> <p>However, this might not be the case for everyone. Some people naturally have an evening “chronotype”, meaning they wake up and stay up later.</p> <p>People with this chronotype appear to have <a href="https://pubmed.ncbi.nlm.nih.gov/36803075/">less success losing weight</a>, no matter the method. This is due to a combination of factors including genes, an increased likelihood to have a poorer diet overall and higher levels of hunger hormones.</p> <h2>Eating fewer meals</h2> <p><a href="https://pubmed.ncbi.nlm.nih.gov/30700403/">Skipping breakfast</a> is common, but does it hinder weight loss? Or is a <a href="https://pubmed.ncbi.nlm.nih.gov/28967343/">larger breakfast and smaller dinner</a> ideal?</p> <p>While <a href="https://pubmed.ncbi.nlm.nih.gov/28137935/">frequent meals</a> may reduce disease risk, recent studies suggest that compared to eating one to two meals a day, eating six times a day might increase <a href="https://pubmed.ncbi.nlm.nih.gov/32437566/">weight loss success</a>.</p> <p>However, this doesn’t reflect the broader research, which tends to show consuming <a href="https://pubmed.ncbi.nlm.nih.gov/33485709/">fewer meals</a> can lead to greater weight loss. <a href="https://pubmed.ncbi.nlm.nih.gov/39485353/">Our research</a> suggests three meals a day is better than six. The easiest way to do this is by cutting out snacks and keeping breakfast, lunch and dinner.</p> <p>Most studies compare three versus six meals, with limited evidence on whether <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7490164/">two meals is better than three</a>.</p> <p>However, <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC11530941/">front-loading your calories</a> (consuming most of your calories between breakfast and lunch) appears to be better for weight loss and may also help <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9605877/">reduce hunger</a> across the day. But more studies with a longer duration are needed.</p> <h2>Fasting, or time-restricted eating</h2> <p>Many of us eat over a period of more than <a href="https://pubmed.ncbi.nlm.nih.gov/26411343/">14 hours a day</a>.</p> <p>Eating late at night <a href="https://pubmed.ncbi.nlm.nih.gov/26411343/">can throw off</a> your body’s natural rhythm and alter how your organs function. Over time, this can increase your risk of type 2 diabetes and other chronic diseases, particularly among <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8617838/">shift workers</a>.</p> <p><a href="https://pubmed.ncbi.nlm.nih.gov/35194176/">Time-restricted eating</a>, a form of intermittent fasting, means eating all your calories within a <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7262456/">six- to ten-hour window</a> during the day when you’re most active. It’s not about changing what or how much you eat, but <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7262456/">when you eat it</a>.</p> <p><a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7262456/">Animal studies</a> suggest time-restricted eating can lead to weight loss and improved metabolism. But the evidence in humans is still limited, especially about the long-term benefits.</p> <p>It’s also unclear if the benefits of time-restricted eating are due to the timing itself or because people are eating less overall. When we looked at studies where participants ate freely (with no intentional calorie limits) but followed an eight-hour daily eating window, they naturally consumed about 200 fewer calories per day.</p> <h2>What will work for you?</h2> <p>In the past, clinicians have thought about weight loss and avoiding weight gain as a simile equation of calories in and out. But factors such as how we distribute our calories across the day, how often we eat and whether we eat late at night may also impact our metabolism, weight and health.</p> <p>There are no easy ways to lose weight. So choose a method, or combination of methods, that suits you best. You might consider</p> <ul> <li>aiming to eat in an eight-hour window</li> <li>consuming your calories earlier, by focusing on breakfast and lunch</li> <li>opting for three meals a day, instead of six.</li> </ul> <p>The <a href="https://link.springer.com/article/10.1007/s13679-024-00555-2">average adult gains 0.4 to 0.7 kg per year</a>. Improving the quality of your diet is important to prevent this weight gain and the strategies above might also help.</p> <p>Finally, there’s still a lot we don’t know about these eating patterns. Many existing studies are short-term, with small sample sizes and varied methods, making it hard to make direct comparisons.</p> <p>More research is underway, including well-controlled trials with larger samples, diverse populations and consistent methods. So hopefully future research will help us better understand how altering our eating patterns can result in better health.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/242028/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/hayley-oneill-1458016">Hayley O'Neill</a>, Assistant Professor, Faculty of Health Sciences and Medicine, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> and <a href="https://theconversation.com/profiles/loai-albarqouni-452476">Loai Albarqouni</a>, Assistant Professor | NHMRC Emerging Leadership Fellow, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/fasting-eating-earlier-in-the-day-or-eating-fewer-meals-what-works-best-for-weight-loss-242028">original article</a>.</em></p>

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Can you die from long COVID? The answer is not so simple

<p><em><a href="https://theconversation.com/profiles/rose-shiqi-luo-1477061">Rose (Shiqi) Luo</a>, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a>; <a href="https://theconversation.com/profiles/catherine-itsiopoulos-14246">Catherine Itsiopoulos</a>, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a>; <a href="https://theconversation.com/profiles/kate-anderson-1412897">Kate Anderson</a>, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a>; <a href="https://theconversation.com/profiles/magdalena-plebanski-1063786">Magdalena Plebanski</a>, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a>, and <a href="https://theconversation.com/profiles/zhen-zheng-1321031">Zhen Zheng</a>, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a></em></p> <p>Nearly five years into the pandemic, COVID is feeling less central to our daily lives.</p> <p>But the virus, SARS-CoV-2, is still around, and for many people the effects of an infection can be long-lasting. When symptoms persist for more than three months after the initial COVID infection, this is generally referred to as <a href="https://www.who.int/europe/news-room/fact-sheets/item/post-covid-19-condition">long COVID</a>.</p> <p>In September, Grammy-winning Brazilian musician <a href="https://www.abc.net.au/news/2024-09-07/brazilian-musician-sergio-mendez-dies-at-83/104323360">Sérgio Mendes</a> died aged 83 after reportedly having long COVID.</p> <p><a href="https://www.abs.gov.au/articles/covid-19-mortality-australia-deaths-registered-until-31-july-2023">Australian data</a> show 196 deaths were due to the long-term effects of COVID from the beginning of the pandemic up to the end of July 2023.</p> <p>In the United States, the Centers for Disease Control and Prevention reported 3,544 <a href="https://www.cdc.gov/nchs/pressroom/nchs_press_releases/2022/20221214.htm">long-COVID-related deaths</a> from the start of the pandemic up to the end of June 2022.</p> <p>The symptoms of <a href="https://www.healthdirect.gov.au/long-covid">long COVID</a> – such as fatigue, shortness of breath and “brain fog” – can be debilitating. But can you die from long COVID? The answer is not so simple.</p> <h2>How could long COVID lead to death?</h2> <p>There’s still a lot we don’t understand about what causes long COVID. A popular theory is that “zombie” <a href="https://www.pnas.org/doi/full/10.1073/pnas.2300644120">virus fragments</a> may linger in the body and cause inflammation even after the virus has gone, resulting in long-term health problems. Recent research suggests a reservoir of <a href="https://www.sciencedirect.com/science/article/abs/pii/S1198743X24004324?via%3Dihub">SARS-CoV-2 proteins</a> in the blood might explain why some people experience ongoing symptoms.</p> <p>We know a serious COVID infection can damage <a href="https://covid19.nih.gov/news-and-stories/long-term-effects-sars-cov-2-organs-and-energy#:%7E:text=What%20you%20need%20to%20know,main%20source%20of%20this%20damage">multiple organs</a>. For example, severe COVID can lead to <a href="https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus/covid-long-haulers-long-term-effects-of-covid19">permanent lung dysfunction</a>, persistent heart inflammation, neurological damage and long-term kidney disease.</p> <p>These issues can in some cases lead to death, either immediately or months or years down the track. But is death beyond the acute phase of infection from one of these causes the direct result of COVID, long COVID, or something else? Whether long COVID can <em>directly</em> cause death continues to be a topic of debate.</p> <p>Of the <a href="https://www.cdc.gov/nchs/data/vsrr/vsrr025.pdf">3,544 deaths</a> related to long COVID in the US up to June 2022, the most commonly recorded underlying cause was COVID itself (67.5%). This could mean they died as a result of one of the long-term effects of a COVID infection, such as those mentioned above.</p> <p>COVID infection was followed by heart disease (8.6%), cancer (2.9%), Alzheimer’s disease (2.7%), lung disease (2.5%), diabetes (2%) and stroke (1.8%). Adults aged 75–84 had the highest rate of death related to long COVID (28.8%).</p> <p>These findings suggest many of these people died “with” long COVID, rather than from the condition. In other words, long COVID may not be a direct driver of death, but rather a contributor, likely exacerbating existing conditions.</p> <h2>‘Cause of death’ is difficult to define</h2> <p>Long COVID is a relatively recent phenomenon, so mortality data for people with this condition are limited.</p> <p>However, we can draw some insights from the experiences of people with post-viral conditions that have been studied for longer, such as myalgic encephalomyelitis or chronic fatigue syndrome (ME/CFS).</p> <p>Like long COVID, <a href="https://bmjopen.bmj.com/content/12/5/e058128">ME/CFS</a> is a complex condition which can have significant and varied effects on a person’s physical fitness, nutritional status, social engagement, mental health and quality of life.</p> <p>Some research indicates people with ME/CFS are at <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5218818/">increased risk</a> of dying from causes including heart conditions, infections and suicide, that may be triggered or compounded by the debilitating nature of the syndrome.</p> <p>So what is the emerging data on long COVID telling us about the potential increased risk of death?</p> <p>Research from 2023 has suggested adults in the US with long COVID were at <a href="https://jamanetwork.com/journals/jama-health-forum/fullarticle/2802095">greater risk</a> of developing heart disease, stroke, lung disease and asthma.</p> <p>Research has also found <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9721155/">long COVID</a> is associated with a higher risk of <a href="https://www.tandfonline.com/doi/full/10.1080/21642850.2022.2164498#abstract">suicidal ideation</a> (thinking about or planning suicide). This may reflect common symptoms and consequences of long COVID such as sleep problems, fatigue, chronic pain and emotional distress.</p> <p>But long COVID is more likely to occur in people who have <a href="https://www.aihw.gov.au/reports/covid-19/long-covid-in-australia-a-review-of-the-literature/summary">existing health conditions</a>. This makes it challenging to accurately determine how much long COVID contributes to a person’s death.</p> <p>Research has long revealed <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7302107/">reliability issues</a> in cause-of-death reporting, particularly for people with chronic illness.</p> <h2>So what can we conclude?</h2> <p>Ultimately, long COVID is a <a href="https://www.health.gov.au/topics/chronic-conditions/about-chronic-conditions">chronic condition</a> that can significantly affect quality of life, mental wellbeing and overall health.</p> <p>While long COVID is not usually immediately or directly life-threatening, it’s possible it could exacerbate existing conditions, and play a role in a person’s death in this way.</p> <p>Importantly, many people with long COVID around the world lack access to appropriate support. We need to develop <a href="https://www.mja.com.au/journal/2024/221/9/persistent-symptoms-after-covid-19-australian-stratified-random-health-survey">models of care</a> for the optimal management of people with long COVID with a focus on multidisciplinary care.</p> <p><em>Dr Natalie Jovanovski, Vice Chancellor’s Senior Research Fellow in the School of Health and Biomedical Sciences at RMIT University, contributed to this article.</em><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/239184/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><a href="https://theconversation.com/profiles/rose-shiqi-luo-1477061"><em>Rose (Shiqi) Luo</em></a><em>, Postdoctoral Research Fellow, School of Health and Biomedical Sciences, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a>; <a href="https://theconversation.com/profiles/catherine-itsiopoulos-14246">Catherine Itsiopoulos</a>, Professor and Dean, School of Health and Biomedical Sciences, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a>; <a href="https://theconversation.com/profiles/kate-anderson-1412897">Kate Anderson</a>, Vice Chancellor's Senior Research Fellow, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a>; <a href="https://theconversation.com/profiles/magdalena-plebanski-1063786">Magdalena Plebanski</a>, Professor of Immunology, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a>, and <a href="https://theconversation.com/profiles/zhen-zheng-1321031">Zhen Zheng</a>, Associate Professor, STEM | Health and Biomedical Sciences, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/can-you-die-from-long-covid-the-answer-is-not-so-simple-239184">original article</a>.</em></p>

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Don’t like drinking plain water? 10 healthy ideas for staying hydrated this summer

<p><em><a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> and <a href="https://theconversation.com/profiles/emily-burch-438717">Emily Burch</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p>Have you heard the saying “water is life?” Well, it’s true.</p> <p>Water is an <a href="https://www.hsph.harvard.edu/nutritionsource/water/">essential nutrient</a>. Our body cannot produce sufficient water to live, so we need to consume water through food and fluids to survive.</p> <p>Maintaining hydration is one of the most fundamental components of good health. But lots of people don’t like drinking plain water much. The good news is there are many other healthy ways to help you stay hydrated.</p> <h2>Why hydration is important</h2> <p>Water is vital for many aspects of body functioning. About half our blood is “blood plasma”, which is over 90% water. Blood plasma is essential for carrying energy, nutrients and oxygen to the cells in the body that need it most. Water helps to remove waste products via the kidneys. It also helps keep joints lubricated, the digestive system functioning, the body’s temperature controlled and skin plump and strong.</p> <p>If you don’t consume enough water, you may experience symptoms of dehydration such as headaches, dizziness, tiredness, low concentration, constipation and a dry mouth. Being severely dehydrated increases the risk of <a href="https://www.kidney.org/atoz/content/kidneystones">kidney stones</a> and <a href="https://www.healthdirect.gov.au/urinary-tract-infection-uti">urinary tract infections</a>.</p> <p>If you feel thirsty, it means your body is already <a href="https://my.clevelandclinic.org/health/treatments/9013-dehydration#:%7E:text=If%20you're%20thirsty%2C%20you,life%2Dthreatening%20illnesses%20like%20heatstroke.">mildly dehydrated</a>, so make sure you pay attention to what your body is telling you.</p> <h2>How much fluid do you need?</h2> <p>The amount of fluid we need changes as we age. Relative to our body weight, our needs decrease. So, a newborn baby has higher fluid needs (per kilogram body weight) than their parent, and older adults have lower fluid needs than younger adults.</p> <p>Fluid requirements are related to metabolic needs and vary from person-to-person. The normal turnover of water in adults is approximately 4% of total body weight per day. So, for example, if you weigh 70 kilograms, you’ll lose about 2.5 to 3 litres of water a day (not including sweating). This means you will need to consume that amount of water from food and drinks to maintain your hydration.</p> <p>Eight cups (or two litres) a day is often <a href="https://www.npr.org/2022/09/21/1124371309/busting-common-hydration-water-myths?utm_source=npr_newsletter&amp;utm_medium=email&amp;utm_content=20221016&amp;utm_term=7386723&amp;utm_campaign=health&amp;utm_id=31926817&amp;orgid=&amp;utm_att1=">mentioned</a> as the amount of water we should aim for and a nice way to track your intake. But it doesn’t account for individual variation based on age, gender, body size and activity levels.</p> <p>Alcohol is a diuretic, which means it dehydrates the body by promoting water loss through urine. This fluid loss is a key factor that contributes to the severity of a hangover. Always have a glass of water in between alcoholic drinks to help stay hydrated.</p> <p>Caffeinated drinks (like tea and coffee) only have a mild diuretic effect. For most healthy adults, it’s okay to consume up to 400 mg of caffeine a day – that’s about four cups of coffee or eight cups of tea. If you drink more than this, it may impact your hydration levels.</p> <p>To check your specific requirements, check out the Australian <a href="https://www.nrv.gov.au/nutrients/water">guidelines</a> for fluid intake.</p> <h2>People who should take extra care</h2> <p>Some people are at greater risk of the harmful health effects from dehydration and need to pay special attention to their fluid intake.</p> <p>The highest priority groups are babies, young kids, pregnant women, and older adults. These groups are at greater risk for many reasons, including relatively higher water needs per kilo of body weight, reduced ability to detect and respond to symptoms of dehydration, and barriers to consuming fluids regularly.</p> <p>Family and friends can play an important role in <a href="https://www.agedcareguide.com.au/information/hydration-for-elderly-people-and-the-dangers-of-dehydration">supporting loved ones</a> to maintain hydration, especially during warm weather.</p> <h2><strong>Ten ideas for keeping fluids up this summer</strong></h2> <ol> <li> <p><strong>Download a water reminder app on your phone</strong> This will help keep you on track during the day and give you digital “high fives” when you hit your water goals.</p> </li> <li> <p><strong>Add sugar-free flavouring</strong> Try a sugar-free fruit infusion in your water to make it more appealing. Prepare a jug in the refrigerator and infuse it overnight so it’s chilled for you the next day. Fill it up and take it everywhere with you!</p> </li> <li> <p><strong>Add some fresh fruit</strong> Add some slices of lime, lemon, berries, pineapple or orange to your water bottle for some natural flavouring. If the bottle is kept in a fridge, the fruit will stay fresh for about three days.</p> </li> <li> <p><strong>Make a jug of iced tea (not the bottled stuff)</strong> There are many great sugar-free recipes online. Tea contributes to fluid intake too. For green and black teas, brew in boiling water then cool overnight on the bench before refrigerating. Fruit teas can be made using cold water immediately.</p> </li> <li> <p><strong>Add a dash of cordial to your water</strong> A small amount of cordial in your water is a healthier alternative to drinking a sugar-sweetened soft drink or fruit juice. Diet cordials have less added sugar again.</p> </li> <li> <p><strong>Make a fruit ‘slushie’</strong> Combine fresh fruit, ice and water at home in the morning and sip to increase your fluid intake for the day.</p> </li> <li> <p><strong>Buy a soda maker for your home</strong> Some people find plain water tastes better with bubbles. Sparkling mineral water is great too, as long as there is no added sugar or sweeteners.</p> </li> <li> <p><strong>Before you eat anything, have a glass of water</strong> Make it a rule with yourself to have a glass of water before every snack or meal.</p> </li> <li> <p><strong>Eat water-rich fruits and vegetables</strong> Many fruits and vegetables have a high water content. Some of the best include berries, oranges, grapes, carrots, lettuce, cabbage, spinach and melons. Keep a container full of cut-up fruit to snack on in your fridge.</p> </li> <li> <p><strong>Use a water bottle</strong> Take it with you during the day and keep it by your bed overnight.</p> </li> </ol> <h2>A tip on water bottles</h2> <p>Water bottles are everywhere and sometimes seem to offer <a href="https://www.refinery29.com/en-au/emotional-support-water-bottle-girlies-tiktok-trend">emotional support</a> as well as hydration.</p> <p>Having a water bottle you enjoy using can go a long way in helping you keep up your fluids during the day.</p> <p>Pay attention to the material of the water bottle and use one that helps you form good habits. Some people prefer metal water bottles as they can keep water cooler for longer (others feel like they are camping). Some prefer glass bottles because the water isn’t affected by any flavours from the container (others fear breaking the glass).</p> <p>Consider the practical aspects, too: Will it fit in your bag? Will it be light enough to carry with you? Can you “chug” on it when you’re exceptionally thirsty? Does the lid require screwing? How durable is it in preventing leaks? Do some <a href="https://www.marthastewart.com/7842071/best-water-bottles-hydration">homework</a> on your water bottle, an essential accessory!</p> <p><em><a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, Professor of Community Health and Wellbeing, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> and <a href="https://theconversation.com/profiles/emily-burch-438717">Emily Burch</a>, Dietitian and Researcher, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/dont-like-drinking-plain-water-10-healthy-ideas-for-staying-hydrated-this-summer-191859">original article</a>.</em></p>

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Humans evolved to share beds – how your sleeping companions may affect you now

<p><em><a href="https://theconversation.com/profiles/goffredina-spano-2240566">Goffredina Spanò</a>, <a href="https://theconversation.com/institutions/kingston-university-949">Kingston University</a> and <a href="https://theconversation.com/profiles/gina-mason-2240569">Gina Mason</a>, <a href="https://theconversation.com/institutions/brown-university-1276">Brown University</a></em></p> <p><a href="https://www.cell.com/trends/ecology-evolution/fulltext/S0169-5347(24)00176-9">Recent research</a> on animal sleep behaviour has revealed that sleep is influenced by the animals around them. Olive baboons, for instance, sleep less as group sizes increase, while mice can synchronise their rapid eye movement (REM) cycles.</p> <p>In western society, many people expect to sleep alone, if not with a romantic partner. But as with other group-living animals, human co-sleeping is common, despite some <a href="https://www.sciencedirect.com/science/article/abs/pii/S1389945710000377">cultural</a> and <a href="https://www.sciencedirect.com/science/article/abs/pii/S2352721820303053?via%3Dihub">age-related variation</a>. And in many cultures, bedsharing with a relative is considered typical.</p> <p>Apart from <a href="https://www.sciencedirect.com/science/article/abs/pii/S1389945710000377">western countries</a>, caregiver-infant co-sleeping is common, with rates as high as <a href="https://www.sciencedirect.com/science/article/abs/pii/S1087079216000265">60-100%</a> in parts of South America, Asia and Africa.</p> <p>Despite its prevalence, infant co-sleeping is controversial. Some western perspectives, that value self-reliance, argue that sleeping alone promotes self-soothing when the baby wakes in the night. But <a href="https://www.tandfonline.com/doi/abs/10.1080/00221325.2021.1905599">evolutionary scientists argue</a> that co-sleeping has been important to help keep infants warm and safe throughout human existence.</p> <p><a href="https://www.sleephealthjournal.org/article/S2352-7218(22)00077-8/abstract">Many cultures</a> do not expect babies to self-soothe when they wake in the night and see night wakings as a normal part of breastfeeding <a href="https://www.sciencedirect.com/science/article/pii/S1389945713002220?via%3Dihub">and development</a>.</p> <p>Concerns about Sudden Infant Death Syndrome (Sids) have often led paediatricians to discourage bed-sharing. However, when studies control for <a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0107799">other Sids risk factors</a> including unsafe sleeping surfaces, Sids risk does not seem to differ statistically between co-sleeping and solitary sleeping infants.</p> <p>This may be one reason why agencies such as the <a href="https://publications.aap.org/pediatrics/article/150/1/e2022057990/188304/Sleep-Related-Infant-Deaths-Updated-2022?autologincheck=redirected">American Academy of Pediatrics</a>, the <a href="https://www.nice.org.uk/guidance/qs37/chapter/Quality-statement-5-Safer-practices-for-bed-sharing">National Institute for Health and Care Excellence</a> and the <a href="https://www.nhs.uk/conditions/baby/caring-for-a-newborn/reduce-the-risk-of-sudden-infant-death-syndrome/">NHS</a> either <a href="https://publications.aap.org/pediatrics/article/150/1/e2022057990/188304/Sleep-Related-Infant-Deaths-Updated-2022">recommend that</a> infants “sleep in the parents’ room, close to the parents’ bed, but on a separate surface,” or, if bedsharing, to make sure that the infant <a href="https://www.nice.org.uk/guidance/qs37/chapter/Quality-statement-5-Safer-practices-for-bed-sharing">“sleeps on a firm, flat mattress”</a> without pillows and duvets, rather than discouraging co-sleeping altogether.</p> <p>Researchers don’t yet know whether co-sleeping causes differences in sleep or, whether co-sleeping happens because of these differences. However, experiments in the 1990s suggested that co-sleeping can <a href="https://onlinelibrary.wiley.com/doi/10.1002/ajpa.20736">encourage more sustained and frequent bouts of breastfeeding</a>. Using sensors to measure brain activity, this research also suggested that infants’ and caregivers’ sleep may be lighter during co-sleeping. But researchers speculated that this lighter sleep may actually <a href="https://www.tandfonline.com/doi/full/10.1080/00221325.2021.1905599">help protect against Sids</a> by providing infants more opportunities to rouse from sleep and develop better control over their respiratory system.</p> <p>Other advocates believe that co-sleeping <a href="https://www.sciencedirect.com/science/article/abs/pii/S0163638319301237">benefits infants’ emotional and mental health</a> by promoting parent-child bonding and aiding infants’ <a href="https://www.tandfonline.com/doi/full/10.3109/10253890.2012.742057">stress hormone regulation</a>. However, current data is inconclusive, with most studies showing <a href="https://www.sciencedirect.com/science/article/abs/pii/S0163638319301249?via%3Dihub">mixed findings</a> or <a href="https://www.tandfonline.com/doi/full/10.1080/14616734.2024.2380427">no differences</a> between co-sleepers and solitary sleepers with respect to short and long-term mental health.</p> <h2>Co-sleeping in childhood</h2> <p>Childhood co-sleeping past infancy is also fairly common according to <a href="https://www.sciencedirect.com/science/article/abs/pii/S1389945713011076?via%3Dihub">worldwide surveys</a>. A <a href="https://publications.aap.org/pediatrics/article-abstract/126/5/e1119/65347/Relationship-Between-Bed-Sharing-and-Breastfeeding">2010 survey</a> of over 7,000 UK families found 6% of children were constant bedsharers up to at least four years old.</p> <p>Some families adopt co-sleeping <a href="https://capmh.biomedcentral.com/articles/10.1186/s13034-023-00607-w">in response to</a> their child having trouble sleeping. But child-parent bedsharing in many countries, including some western countries <a href="https://onlinelibrary.wiley.com/doi/10.1111/j.1471-6712.2005.00358.x">like Sweden</a> where children often co-sleep with parents until school age, is viewed culturally as part of a nurturing environment.</p> <p>It is also common for siblings to share a room or even a bed. A <a href="https://www.tandfonline.com/doi/full/10.1080/00221325.2021.1916732">2021 US study</a> found that over 36% of young children aged three to five years bedshared in some form overnight, whether with caregivers, siblings, pets or some combination. Co-sleeping decreases but is still present among older children, with up to <a href="https://onlinelibrary.wiley.com/doi/10.1111/fare.12955">13.8% of co-sleeping parents</a> in Australia, the UK and other countries reporting that their child was between five and 12 years old when they engaged in co-sleeping.</p> <p>Two recent US studies using wrist-worn actigraphs (motion sensors) to track sleep indicated that kids who bedshare may have <a href="https://jcsm.aasm.org/doi/10.5664/jcsm.11352">shorter sleep durations</a> than children who sleep alone. But this shorter sleep duration <a href="https://www.tandfonline.com/doi/full/10.1080/00221325.2021.1916732">is not explained by</a> greater disruption during sleep. Instead, bedsharing children may lose sleep by <a href="https://www.tandfonline.com/doi/full/10.1080/00221325.2021.1916732">going to bed later than</a> solitary sleepers.</p> <p>The benefits and downsides of co-sleeping may also differ in children with conditions such as <a href="https://www.sciencedirect.com/science/article/abs/pii/S1389945717303842">autism spectrum disorder</a>, <a href="https://link.springer.com/article/10.1007/s10802-017-0387-1">mental health disorders</a> and <a href="https://onlinelibrary.wiley.com/doi/10.1111/dmcn.13300">chronic illnesses</a>. These children may experience heightened anxiety, sensory sensitivities and physical discomfort that make falling and staying asleep difficult. For them, co-sleeping can provide <a href="https://link.springer.com/article/10.1007/s11325-018-1710-y">reassurance</a>.</p> <h2>Adults sharing beds</h2> <p>According to <a href="https://www.sleepfoundation.org/wp-content/uploads/2018/10/NSF_Bedroom_Poll_Report_1.pdf">a 2018 survey</a> from the US National Sleep Foundation, 80-89% of adults who live with their significant other share a bed with them. Adult bedsharing has shifted over time from pre-industrial <a href="https://academic.oup.com/ahr/article-abstract/106/2/343/64370?redirectedFrom=fulltext">communal arrangements</a>, including whole families and other household guests, to <a href="https://academic.oup.com/jdh/article-abstract/23/3/275/359439?redirectedFrom=fulltext">solo sleeping</a> in response to hygiene concerns as germ theory became accepted.</p> <p>Many couples find that bedsharing boosts their <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC1978364/">sense of closeness</a>. Research shows that bedsharing with your partner can lead to <a href="https://onlinelibrary.wiley.com/doi/10.1155/2017/8140672">longer sleep times</a> and a <a href="https://academic.oup.com/sleep/article-abstract/17/4/308/2753131">feeling of better sleep</a> overall.</p> <p>Bedsharing couples also often <a href="https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2020.00583/full">get into sync</a> with each other’s sleep stages, which can enhance that feeling of intimacy. However, it’s not all rosy. Some studies indicate that females in heterosexual relationships may struggle more with sleep quality when bedsharing, as they can be <a href="https://link.springer.com/article/10.1111/j.1479-8425.2007.00320.x">more easily disturbed</a> by their male partner’s movements. Also, bedsharers can have less <a href="https://pubmed.ncbi.nlm.nih.gov/27624285/">deep sleep</a> than when sleeping alone, even though they feel like their sleep is better together.</p> <p>Many questions about co-sleeping remain unanswered. For instance, we don’t fully understand the developmental effects of co-sleeping on children, or the benefits of co-sleeping for adults beyond female-male romantic partners. But, some work suggests that co-sleeping can <a href="https://link.springer.com/article/10.1007/s11325-018-1710-y">comfort us</a>, similar to other <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/jsr.14174">forms of social contact</a>, and help to enhance <a href="https://onlinelibrary.wiley.com/doi/10.1002/ajpa.20736">physical synchrony</a> between parents and children.</p> <p>Co-sleeping doesn’t have a one-size-fits-all answer. But remember that western norms aren’t necessarily the ones we have evolved with. So consider factors such as <a href="https://www.sciencedirect.com/science/article/abs/pii/S1389945716301265">sleep disorders</a>, health and age in your decision to co-sleep, rather than what everyone else is doing.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/241803/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/goffredina-spano-2240566">Goffredina Spanò</a>, Lecturer in Developmental Cognitive Neuroscience, <a href="https://theconversation.com/institutions/kingston-university-949">Kingston University</a> and <a href="https://theconversation.com/profiles/gina-mason-2240569">Gina Mason</a>, Postdoctoral Research Fellow in Psychiatry and Human Behaviour, <a href="https://theconversation.com/institutions/brown-university-1276">Brown University</a></em></p> <p><em>Image </em><em>credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/humans-evolved-to-share-beds-how-your-sleeping-companions-may-affect-you-now-241803">original article</a>.</em></p>

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Is thirst a good predictor of dehydration?

<p><em><a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> and <a href="https://theconversation.com/profiles/kiara-too-2243669">Kiara Too</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p>Water is essential for daily functioning and health, and we can only survive <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2908954/">a few days</a> without it. Yet we constantly lose water through sweat, urination and even evaporation when we breathe.</p> <p>This is why we <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC5957508/">have evolved</a> a way to regulate and maintain water in our bodies. Like other animals, our survival relies on a strong biological drive that tells us to find and drink water to balance fluid loss.</p> <p>This is thirst – a sensation of dryness in the mouth signalling we need to have a drink. This <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC5957508/">basic physiological mechanism</a> is controlled mainly by part of the brain’s “control centre”, called the hypothalamus. The hypothalamus <a href="https://www.ncbi.nlm.nih.gov/books/NBK535380/#:%7E:text=The%20hypothalamus%20is%20the%20region,and%20the%20control%20of%20appetite.">receives signals</a> from various regions of the body and in return, releases hormones that act as a messenger to signal the thirst sensation.</p> <h2>What is dehydration?</h2> <p>Staying hydrated (having enough water in our bodies) is important for <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2908954/">several reasons</a>, including:</p> <ul> <li>regulating body temperature through sweat and respiration</li> <li>lubricating joints and eyes</li> <li>preventing infections</li> <li>digesting and absorbing nutrients</li> <li>flushing out waste (via the kidneys)</li> <li>preventing constipation</li> <li>brain function (including memory and concentration)</li> <li>mood and energy levels</li> <li>physical performance and recovery from exercise</li> <li>skin health.</li> </ul> <p>Dehydration occurs when our body doesn’t have enough water. Even slight drops in fluid levels have <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2908954/">noticeable consequences</a>, such as headaches, feeling dizzy, lethargy and struggling to concentrate.</p> <p><a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4874113/">Chronic dehydration</a> can pose more serious health risks, including urinary tract infections, constipation and kidney stones.</p> <h2>What does the evidence say?</h2> <p>Despite thirst being one of the most basic biological drivers for good hydration, science suggests our feelings of thirst and subsequent fluid intake don’t always correlate with hydration levels.</p> <p>For example, a <a href="https://www.mdpi.com/2072-6643/16/18/3212">recent study</a> explored the impact of thirst on fluid intake and hydration status. Participants attended a lab in the morning and then later in the afternoon to provide markers of hydration status (such as urine, blood samples and body weight). The relationship between levels of thirst in the morning and afternoon hydration status was negligible.</p> <p>Further, thirst may be driven by environmental factors, such as access to water. For example, <a href="https://www.sciencedirect.com/science/article/pii/0031938484901549">one study</a> looked at whether ample access to water in a lab influenced how much people drank and how hydrated they were. The link between how thirsty they felt and how hydrated they were was weak, suggesting the availability of water influenced their fluid intake more than thirst.</p> <p>Exercise can also <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6893511/">change our thirst mechanism</a>, though studies are limited at this stage.</p> <p>Interestingly, research shows women experience thirst more strongly than men, regardless of hydration status. To understand <a href="https://www.sciencedirect.com/science/article/pii/S2475299123148852">gender differences in thirst</a>, researchers infused men and women with fluids and then measured their thirst and how hydrated they were. They found women generally reported thirst at a lower level of fluid loss. Women have also been found to respond more <a href="https://www.mdpi.com/2072-6643/16/18/3212">to feeling thirsty</a> by drinking more water.</p> <h2>Other ways to tell if you need to drink some water</h2> <p>While acknowledging some people will need to drink more or less, for <a href="https://theconversation.com/dont-like-drinking-plain-water-10-healthy-ideas-for-staying-hydrated-this-summer-191859">many people</a>, eight cups (or two litres) a day is a good amount of water to aim for.</p> <p>But beyond thirst, there are many other ways to tell whether you might need to drink more water.</p> <p><strong>1. urine colour:</strong> pale yellow urine typically indicates good hydration, while darker, concentrated urine suggests dehydration</p> <p><strong>2. frequency of going to the toilet:</strong> <a href="https://www.ncbi.nlm.nih.gov/books/NBK291/">urinating regularly</a> (around four to six times a day) indicates good hydration. Infrequent urination can signal dehydration</p> <p><strong>3. skin turgor test:</strong> gently <a href="https://www.healthline.com/health/skin-turgor#test">pinching the skin</a> (for example, on the back of the hand) and observing how quickly the skin returns to its normal position can help assess hydration. Slow return may indicate dehydration</p> <p><strong>4. mouth and lips:</strong> a dry mouth or cracked lips can be early signs of dehydration</p> <p><strong>5. headaches and fatigue:</strong> frequent headaches, dizziness, or unexplained fatigue can be <a href="https://www.tandfonline.com/doi/full/10.1080/07853890.2019.1628352">signs of inadequate hydration</a></p> <p><strong>6. sweating:</strong> in physically active people, monitoring how much they sweat during activity can help estimate fluid loss and hydration needs. Higher levels of sweat may predispose a person to dehydration if they are unable to replace the fluid lost through water intake</p> <p>These indicators, used together, provide a more comprehensive picture of hydration without solely depending on the sensation of thirst.</p> <p>Of course, if you do feel thirsty, it’s still a good idea to drink some water.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/242194/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, Professor of Community Health and Wellbeing, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> and <a href="https://theconversation.com/profiles/kiara-too-2243669">Kiara Too</a>, PhD candidate, School of Human Movement and Nutrition Sciences, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/is-thirst-a-good-predictor-of-dehydration-242194">original article</a>.</em></p>

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From eye exams to blood tests and surgery: how doctors use light to diagnose disease

<p><em><a href="https://theconversation.com/profiles/matthew-griffith-1539353">Matthew Griffith</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p>You’re not feeling well. You’ve had a pounding headache all week, dizzy spells and have vomited up your past few meals.</p> <p>You visit your GP to get some answers and sit while they shine a light in your eyes, order a blood test and request some medical imaging.</p> <p>Everything your GP just did relies on light. These are just some of the optical technologies that have had an enormous impact in how we diagnose disease.</p> <h2>1. On-the-spot tests</h2> <p>Point-of-care diagnostics allow doctors to test patients on the spot and get answers in minutes, rather than sending samples to a lab for analysis.</p> <p>The “flashlight” your GP uses to view the inside of your eye (known as an <a href="https://medlineplus.gov/ency/article/003881.htm">ophthalmoscope</a>) is a great example. This allows doctors to detect abnormal blood flow in the eye, deformations of the cornea (the outermost clear layer of the eye), or swollen optical discs (a round section at the back of the eye where the nerve link to the brain begins). Swollen discs are a sign of elevated pressure inside your head (or in the worst case, a brain tumour) that could be <a href="https://www.hopkinsmedicine.org/health/conditions-and-diseases/headache/increased-intracranial-pressure-icp-headache">causing your headaches</a>.</p> <p>The invention of <a href="https://openmedscience.com/lighting-the-way-in-healthcare-the-transformative-role-of-lasers-in-medicine/">lasers and LEDs</a> has enabled many other miniaturised technologies to be provided at the bedside or clinic rather than in the lab.</p> <p><a href="https://theconversation.com/whats-a-pulse-oximeter-should-i-buy-one-to-monitor-covid-at-home-174457">Pulse oximetry</a> is a famous example, where a clip attached to your finger reports how well your blood is oxygenated. It does this by <a href="https://www.howequipmentworks.com/pulse_oximeter/">measuring</a> the different responses of oxygenated and de-oxygenated blood to different colours of light.</p> <p>Pulse oximetry is used at hospitals (and <a href="https://theconversation.com/whats-a-pulse-oximeter-should-i-buy-one-to-monitor-covid-at-home-174457">sometimes at home</a>) to monitor your respiratory and heart health. In hospitals, it is also a valuable tool for detecting <a href="https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(12)60107-X/fulltext">heart defects in babies</a>.</p> <h2>2. Looking at molecules</h2> <p>Now, back to that blood test. Analysing a small amount of your blood can diagnose <a href="https://theconversation.com/blood-tests-and-diagnosing-illness-what-can-blood-tell-us-about-whats-happening-in-our-body-80327">many different diseases</a>.</p> <p>A machine called an automated “full blood count analyser” tests for general markers of your health. This machine directs focused beams of light through blood samples held in small glass tubes. It counts the number of blood cells, determines their specific type, and reports the level of haemoglobin (the protein in red blood cells that distributes oxygen around your body). In minutes, this machine can provide a <a href="https://www.nuffieldhealth.com/article/inside-the-pathology-lab-what-happens-to-my-blood">snapshot</a> of your overall health.</p> <p>For more specific disease markers, blood serum is separated from the heavier cells by spinning in a rotating instrument called a centrifuge. The serum is then exposed to special chemical stains and enzyme assays that change colour depending on whether specific molecules, which may be the sign of a disease, are present.</p> <p>These colour changes can’t be detected with the naked eye. However, a light beam from an instrument called a <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5476943/#R88">spectrometer</a> can detect tiny amounts of these substances in the blood and determine if the biomarkers for diseases are present, and at what levels.</p> <h2>3. Medical imaging</h2> <p>Let’s re-visit those medical images your GP ordered. The development of fibre-optic technology, made famous for transforming high-speed digital communications (such as the NBN), allows light to get inside the body. The result? High-resolution optical imaging.</p> <p>A common example is an <a href="https://www.medicalnewstoday.com/articles/153737#risks-and-side-effects">endoscope</a>, where fibres with a tiny camera on the end are inserted into the body’s natural openings (such as your mouth or anus) to examine your gut or respiratory tracts.</p> <p>Surgeons can insert the same technology through tiny cuts to view the inside of the body on a video screen during <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9553337/">laparoscopic surgery</a> (also known as keyhole surgery) to diagnose and treat disease.</p> <h2>How about the future?</h2> <p>Progress in nanotechnology and a better understanding of the interactions of light with our tissues are leading to new light-based tools to help diagnose disease. These include:</p> <ul> <li> <p><a href="https://onlinelibrary.wiley.com/doi/full/10.1002/advs.201903441">nanomaterials</a> (materials on an extremely small scale, many thousands of times smaller than the width of a human hair). These are being used in next-generation sensors and new diagnostic tests</p> </li> <li> <p><a href="https://www.nature.com/articles/s41587-019-0045-y">wearable optical biosensors</a> the size of your fingernail can be included in devices such as watches, contact lenses or finger wraps. These devices allow non-invasive measurements of sweat, tears and saliva, in real time</p> </li> <li> <p>AI tools to analyse how blood serum scatters infrared light. This has allowed researchers to build a <a href="https://www.advancedsciencenews.com/powerful-diagnostic-approach-uses-light-to-detect-virtually-all-forms-of-cancer/">comprehensive database</a> of scatter patterns to detect <a href="https://onlinelibrary.wiley.com/doi/full/10.1002/aisy.202300006">any cancer</a></p> </li> <li> <p>a type of non-invasive imaging called <a href="https://www.ncbi.nlm.nih.gov/books/NBK554044/">optical coherence tomography</a> for more detailed imaging of the eye, heart and skin</p> </li> <li> <p>fibre optic technology to deliver a tiny microscope into the body on the <a href="https://www.uwa.edu.au/projects/microscope-in-a-needle">tip of a needle</a>.</p> </li> </ul> <p>So the next time you’re at the GP and they perform (or order) some tests, chances are that at least one of those tests depend on light to help diagnose disease.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/231379/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><a href="https://theconversation.com/profiles/matthew-griffith-1539353"><em>Matthew Griffith</em></a><em>, Associate Professor and ARC Future Fellow and Director, UniSA Microscopy and Microanalysis Facilities, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/from-eye-exams-to-blood-tests-and-surgery-how-doctors-use-light-to-diagnose-disease-231379">original article</a>.</em></p>

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What are house dust mites and how do I know if I’m allergic to them?

<p><em><a href="https://theconversation.com/profiles/deryn-lee-thompson-1449312">Deryn Lee Thompson</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p>People often believe they are allergic to <a href="https://ahd.csiro.au/everything-in-our-homes-gathers-dust-but-what-exactly-is-it-where-does-it-come-from-and-why-does-it-keep-coming-back-is-it-from-outside-is-it-fibres-from-our-clothes-and-cells-from-our-skin/">house dust</a>. But of the <a href="https://www.allergy.org.au/patients/allergy-treatments/allergen-minimisation">20% of Australians</a> suffereing with allergies, a number are are actually allergic to microscopic <a href="https://www.healthdirect.gov.au/dust-mites">house dust mites</a>.</p> <p>House dust mites belong to the same family as spiders and ticks. They measure just 0.2-0.3 mm, with 50 fitting on a single pinhead. They <a href="https://www.intechopen.com/chapters/71977">live</a> for 65–100 days, and females lay 60–100 eggs in their life.</p> <p>House dust mites love temperate climates and humidity. They feed off the skin cells we and animals shed, as well as mould, which they digest using special enzymes. These enzymes are excreted in their poo about <a href="https://www.intechopen.com/chapters/71977">20 times a day</a>. They also shed fragments of their exoskeletons.</p> <p>All these fragments trigger allergies in people with this type of allergic rhinitis (which is also known as hay fever)</p> <h2>What are the symptoms?</h2> <p>When people with house dust mite allergy inhale the allergens, they penetrate the mucous membranes of the airways and eyes. Their body recognises the allergens as a threat, releasing chemicals including one called histamine.</p> <p>This causes symptoms including a runny nose, an itchy nose, eyes and throat, sneezing, coughing and a feeling of mucus at the back of your throat (known as a post-nasal drip).</p> <p>People with this type of allergy usually mouth breath, snore, rub their nose constantly (creating a nasal crease called the “dust mite salute”) and have dark shadows under their eyes.</p> <p>House dust mite allergy <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7328274/">can also cause</a> poor sleep, constant tiredness, reduced concentration at work or school and lower quality of life.</p> <p>For people with eczema, their damaged skin barrier can allow house dust mite proteins in. This prompts immune cells in the skin to <a href="https://academic.oup.com/bjd/article/190/1/e5/7485663">release chemicals</a> which make already flared skin become redder, sorer and itchier, especially in children.</p> <p>Symptoms of house dust mite allergy occur year round, and are often worse after going to bed and when waking in the morning. But people with house dust mite allergy <em>and</em> pollen allergies find their year-round symptoms worsen in spring.</p> <h2>How is it diagnosed?</h2> <p>House dust mite allergy symptoms often build up over months, or even years before people seek help. But an accurate diagnosis means you can not only access the right treatment – it’s also vital for minimising exposure.</p> <p>Doctor and nurse practitioners can order a <a href="https://www.allergy.org.au/patients/allergy-treatments/allergen-minimisation">blood test</a> to check for house dust mite allergy.</p> <p>Alternatively, health care providers with <a href="https://www.allergy.org.au/hp/a-career-in-clinical-immunology-and-allergy">specialised allergy training</a> can perform skin prick tests. This involves placing drops of the allergens on the arm, along with a positive and negative “control”. After 15 minutes, those who test positive will have developed a mosquito bite-like mark.</p> <h2>How is it treated?</h2> <p>Medication options include one or a combination of:</p> <ul> <li>daily non-sedating antihistamines</li> <li>a steroid nasal spray</li> <li>allergy eye drops.</li> </ul> <p>Your health care professional will work with you to develop a <a href="https://www.allergy.org.au/images/stories/pospapers/ar/ASCIA_HP_Allergic_Rhinitis_2022.pdf">rhinitis (hay fever) medical management plan</a> to reduce your symptoms. If you’re using a nasal spray, your health provider will <a href="https://www.youtube.com/watch?v=_ytYj1TLojM">show you how to use it</a>, as people often use it incorrectly.</p> <p>If you also have <a href="https://www.nationalasthma.org.au/understanding-asthma/how-is-asthma-managed">asthma</a> or eczema which is worsened by dust mites, your health provider will adapt your <a href="https://www.nationalasthma.org.au/health-professionals/asthma-action-plans">asthma action plan</a> or <a href="https://medcast.com.au/qhub/eczema/resources">eczema care plan</a> accordingly.</p> <p>If you experience severe symptoms, a longer-term option is <a href="https://www.allergy.org.au/images/pc/ASCIA_PC_Allergen_Immunotherapy_FAQ_2024.pdf">immunotherapy</a>. This aims to gradually turn off your immune system’s ability to recognise house dust mites as a harmful allergen.</p> <p>Immunotherapy involves taking either a daily sublingual tablet, under the tongue, or a series of injections. Injections require monthly attendances over three years, after the initial weekly build-up phase.</p> <p>These are <a href="https://theconversation.com/im-considering-allergen-immunotherapy-for-my-hay-fever-what-do-i-need-to-know-190408">effective</a>, but are costly (as well as time-consuming). So it’s important to weigh up the potential benefits and downsides with your health-care provider.</p> <h2>How can you minimise house dust mites?</h2> <p>There are also important allergy minimisation measures you can take to reduce allergens in your home.</p> <p>Each week, <a href="https://www.allergy.org.au/component/finder/search?q=minimisation&amp;Itemid=100001">wash</a> your bedding and pyjamas in hot water (over 60°C). This <a href="https://www.nationalasthma.org.au/living-with-asthma/resources/patients-carers/factsheets/dust-mites-trigger-my-asthma">removes</a> house dust mite eggs and debris.</p> <p>Opt for doonas, covers or quilts that can be washed in hot water above 60°C. Alternatively, low-cost waterproof or leak proof covers can keep house dust mites out.</p> <p>If you can, favour blinds and wood floors over curtains and carpet. Dust blinds and surfaces with a damp cloth each week and vacuum while wearing a mask, or have someone else do it, as house dust mites can become airborne during cleaning.</p> <p>But beware of costly products with big marketing budgets and little evidence to support their use. A new mattress, for example, will always be house dust mite-free. But once slept on, the house dust mite life cycle can start.</p> <p>Mattress protectors and toppers commonly claim to be “hypoallergenic”, “anti-allergy” or “allergy free”. But their pore sizes are not small enough to keep house dust mites and their poo out, or shed skin going through.</p> <p>Sprays claiming to kill mites require so much spray to penetrate the product that it’s likely to become wet, may smell like the spray and, unless dried properly, may grow mould.</p> <p>Finally, claims that expensive vacuum cleaners can extract all the house dust mites are unsubstantiated.</p> <p><em>For more information, visit <a href="https://www.healthdirect.gov.au/dust-mites">healthdirect.gov.au</a> or the <a href="https://www.allergy.org.au/patients/allergy-treatments/allergen-minimisation">Australian Society of Clinical Immunology and Allergy</a>.</em><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/240918/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/deryn-lee-thompson-1449312">Deryn Lee Thompson</a>, Eczema and Allergy Nurse; Lecturer, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/what-are-house-dust-mites-and-how-do-i-know-if-im-allergic-to-them-240918">original article</a>.</em></p>

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