What are house dust mites and how do I know if I’m allergic to them?
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People often believe they are allergic to house dust. But of the 20% of Australians suffereing with allergies, a number are are actually allergic to microscopic house dust mites.
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 live for 65–100 days, and females lay 60–100 eggs in their life.
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 20 times a day. They also shed fragments of their exoskeletons.
All these fragments trigger allergies in people with this type of allergic rhinitis (which is also known as hay fever)
What are the symptoms?
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.
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).
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.
House dust mite allergy can also cause poor sleep, constant tiredness, reduced concentration at work or school and lower quality of life.
For people with eczema, their damaged skin barrier can allow house dust mite proteins in. This prompts immune cells in the skin to release chemicals which make already flared skin become redder, sorer and itchier, especially in children.
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 and pollen allergies find their year-round symptoms worsen in spring.
How is it diagnosed?
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.
Doctor and nurse practitioners can order a blood test to check for house dust mite allergy.
Alternatively, health care providers with specialised allergy training 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.
How is it treated?
Medication options include one or a combination of:
- daily non-sedating antihistamines
- a steroid nasal spray
- allergy eye drops.
Your health care professional will work with you to develop a rhinitis (hay fever) medical management plan to reduce your symptoms. If you’re using a nasal spray, your health provider will show you how to use it, as people often use it incorrectly.
If you also have asthma or eczema which is worsened by dust mites, your health provider will adapt your asthma action plan or eczema care plan accordingly.
If you experience severe symptoms, a longer-term option is immunotherapy. This aims to gradually turn off your immune system’s ability to recognise house dust mites as a harmful allergen.
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.
These are effective, 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.
How can you minimise house dust mites?
There are also important allergy minimisation measures you can take to reduce allergens in your home.
Each week, wash your bedding and pyjamas in hot water (over 60°C). This removes house dust mite eggs and debris.
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.
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.
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.
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.
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.
Finally, claims that expensive vacuum cleaners can extract all the house dust mites are unsubstantiated.
For more information, visit healthdirect.gov.au or the Australian Society of Clinical Immunology and Allergy.
Deryn Lee Thompson, Eczema and Allergy Nurse; Lecturer, University of South Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Peas vs Green Beans – Which is Healthier?
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Our Verdict
When comparing peas to green beans, we picked the peas.
Why?
Looking at macros first, peas have nearly 6x the protein, nearly 2x the fiber, and nearly 2x the carbs, making them the “more food per food” choice.
In terms of vitamins, peas have more of vitamins A, B1, B2, B3, B5, B6, B7, B9, C, and choline, while green beans have more of vitamins E and K. An easy win for peas.
In the category of minerals, peas have more copper, iron, magnesium, manganese, phosphorus, potassium, selenium, and zinc, while green beans have more calcium. Another overwhelming win for peas.
In short, enjoy both (diversity is good), but there’s a clear winner here and it’s peas.
Want to learn more?
You might like to read:
Peas vs Broad Beans – Which is Healthier?
Take care!
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Raspberries vs Blackberries – Which is Healthier?
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Our Verdict
When comparing raspberries to blackberries, we picked the blackberries.
Why?
It was very close! Raspberries most certainly also have their merits. But blackberries do just a little bit better in a few categories:
In terms of macros, raspberries have a tiny bit more carbs and fiber, while blackberries have a even tinier bit more protein, and the two berries have an equal glycemic index. We’ll call this category a tie, or else the meanest of nominal wins for raspberry.
In the category of vitamins, raspberries have more of vitamins B1, B2, B5, B6, and choline, while blackberries have more of vitamins A, B3, B9, C, E, and K. This would be a very marginal win for blackberries, except that blackberries have more than 6x the vitamin A, a much larger margin than any of the other differences in vitamins (which were usually small differences), which gives blackberry a more convincing win here.
When it comes to minerals, things are closer: raspberries have more iron, magnesium, manganese, and phosphorus, while blackberries have more calcium, copper, potassium, selenium, and zinc. None of the differences are outstanding, so this is a simple marginal victory for blackberries.
It would be rude to look at berries without noting their polyphenols; we’re not list them all (or this article will get very long, because each has very many polyphenols with names like “pelargonidin 3-O-glucosyl-rutinoside” and so forth), but suffice it to say: raspberries are great for polyphenols and blackberries are even better for polyphenols.
That said… In the category of specific polyphenols we’ve written about before at 10almonds, it’s worth noting a high point of each berry, for the sake of fairness: raspberries have more quercetin (but blackberries have lots too) and blackberries have more ellagic acid (of which, raspberries have some, but not nearly as much). Anyway, just going off total polyphenol content, blackberries are the clear winner here.
Adding up the sections makes for an overall win for blackberries, but by all means, enjoy either or both; diversity is good!
Want to learn more?
You might like to read:
21 Most Beneficial Polyphenols & What Foods Have Them
Enjoy!
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Improving Women’s Health Across the Lifespan – by Dr. Michelle Tollefson et al.
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We say “et al.”, because this hefty book (504 pages) is a compilation of contributions by about 60 authors, of whom, 100% are doctors and about 90% are women.
As one might expect from a book with many small self-contained chapters by such a lot of doctors, the content is very diverse, though the style is consistent throughout, likely due to the authors working from a style sheet, plus the work of the editorial team.
About that content: the focus here is lifestyle medicine, and while much of the advice will go for men too (most people are unlikely to go wrong with “eat more fruits and vegetables and get better sleep” etc), anything more detailed than that (of which there’s a lot) is focussed on women. Hence, we get chapters on optimal nutrition for women, physical activity for women, sleep and women’s health, etc, as well as topics that can affect everyone but disproportionately affect women—ranging from autoimmune diseases to social burdens that affect health in measurable ways. There’s also, as you might expect, plenty about sexual health, pregnancy-related health, menopausal health, and so forth.
The strength of this book is really in its diversity; it’s very much a case of “60 heads are better than one”, and as such, we’re pretty much getting 60 books for the price of one here, as each author brings what they are most specialized in.
Bottom line: if you are a woman and/or love a woman, this book is packed with information that will be of interest and applicable use.
Click here to check out Improving Women’s Health Across The Lifespan, and do just that!
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Eat All You Want (But Wisely)
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Some Surprising Truths About Hunger And Satiety
This is Dr. Barbara Rolls. She’s Professor and Guthrie Chair in Nutritional Sciences, and Director of the Laboratory for the Study of Human Ingestive Behavior at Pennsylvania State University, after graduating herself from Oxford and Cambridge (yes, both). Her “awards and honors” take up four A4 pages, so we won’t list them all here.
Most importantly, she’s an expert on hunger, satiety, and eating behavior in general.
What does she want us to know?
First and foremost: you cannot starve yourself thin, unless you literally starve yourself to death.
What this is about: any weight lost due to malnutrition (“not eating enough” is malnutrition) will always go back on once food becomes available. So unless you die first (not a great health plan), merely restricting good will always result in “yo-yo dieting”.
So, to avoid putting the weight back on and feeling miserable every day along the way… You need to eat as much as you feel you need.
But, there’s a trick here (it’s about making you genuinely feel you need less)!
Your body is an instrument—so play it
Your body is the tool you use to accomplish pretty much anything you do. It is, in large part, at your command. Then there are other parts you can’t control directly.
Dr. Rolls advises taking advantage of the fact that much of your body is a mindless machine that will simply follow instructions given.
That includes instructions like “feel hungry” or “feel full”. But how to choose those?
Volume matters
An important part of our satiety signalling is based on a physical sensation of fullness. This, by the way, is why bariatric surgery (making a stomach a small fraction of the size it was before) works. It’s not that people can’t eat more (the stomach is stretchy and can also be filled repeatedly), it’s that they don’t want to eat more because the pressure sensors around the stomach feel full, and signal the hormone leptin to tell the brain we’re full now.
Now consider:
- On the one hand, 20 grapes, fresh and bursting with flavor
- On the other hand, 20 raisins (so, dried grapes), containing the same calories
Which do you think will get the leptin flowing sooner? Of course, the fresh grapes, because of the volume.
So if you’ve ever seen those photos that show two foods side by side with the same number of calories but one is much larger (say, a small slice of pizza or a big salad), it’s not quite the cheap trick that it might have appeared.
Or rather… It is a cheap trick; it’s just a cheap trick that works because your stomach is quite a simple organ.
So, Dr. Rolls’ advice: generally speaking, go for voluminous food. Fruit is great from this, because there’s so much water. Air-popped popcorn also works great. Vegetables, too.
Water matters, but differently than you might think
A well-known trick is to drink water before and with a meal. That’s good, it’s good to be hydrated. However, it can be better. Dr. Rolls did an experiment:
The design:
❝Subjects received 1 of 3 isoenergetic (1128 kJ) preloads 17 min before lunch on 3 d and no preload on 1 d.
The preloads consisted of 1) chicken rice casserole, 2) chicken rice casserole served with a glass of water (356 g), and 3) chicken rice soup.
The soup contained the same ingredients (type and amount) as the casserole that was served with water.❞
The results:
❝Decreasing the energy density of and increasing the volume of the preload by adding water to it significantly increased fullness and reduced hunger and subsequent energy intake at lunch.
The equivalent amount of water served as a beverage with a food did not affect satiety.❞
The conclusion:
❝Consuming foods with a high water content more effectively reduced subsequent energy intake than did drinking water with food.❞
You can read the study in full (it’s a worthwhile read!) here:
Water incorporated into a food but not served with a food decreases energy intake in lean women
Protein matters
With all those fruits and vegetables and water, you may be wondering Dr. Rolls’ stance on proteins. It’s simple: protein is an appetite suppressant.
However, it takes about 20 minutes to signal the brain about that, so having some protein in a starter (if like this writer, you’re the cook of the household, a great option is to enjoy a small portion of nuts while cooking!) gets that clock ticking, to signal satiety sooner.
It may also help in other ways:
Clinical Evidence and Mechanisms of High-Protein Diet-Induced Weight Loss
As for other foods that can suppress appetite, by the way, you might like;
25 Foods That Act As Natural Appetite Suppressants
Variety matters, and in ways other than you might think
A wide variety of foods (especially: a wide variety of plants) in one’s diet is well recognized as a key to a good balanced diet.
However…
A wide variety of dishes at the table, meanwhile, promotes greater consumption of food.
Dr. Rolls did a study on this too, a while ago now (you’ll see how old it is) but the science seems robust:
Variety in a Meal Enhances Food Intake in Man
Notwithstanding the title, it wasnot about a man (that was just how scientists wrote in ye ancient times of 1981). The test subjects were, in order: rats, cats, a mixed group of men and women, the same group again, and then a different group of all women.
So, Dr. Rolls’ advice is: it’s better to have one 20-ingredient dish, than 10 dishes with 20 ingredients between them.
Sorry! We love tapas and buffets too, but that’s the science!
So, “one-pot” meals are king in this regard; even if you serve it with one side (reasonable), that’s still only two dishes, which is pretty good going.
Note that the most delicious many-ingredient stir-fries and similar dishes from around the world also fall into this category!
Want to know more?
If you have the time (it’s an hour), you can enjoy a class of hers for free:
Want to watch it, but not right now? Bookmark it for later
Enjoy!
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What Nobody Teaches You About Strengthening Your Knees
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Strengthening unhappy knees can seem difficult, because many obvious exercises like squats may hurt, and can feel like they are doing harm (and if your knees are bad enough, maybe they are; it depends on many factors). Here’s a way to improve things:
The muscle nobody talks about
Well, not nobody. But, it’s a muscle that’s rarely talked about; namely, the tibialis anterior.
It plays a key role in decelerating knee motion—in other words, the movement that hurts if you have bad knees. It’s essential for absorbing shock during activities like walking, climbing stairs, and stepping off curbs
So, of course, strengthening this muscle supports knee health.
The exercise this video recommends for strengthening it involves leaning against a wall with feet about a foot away (closer feet make it easier, further makes it harder). Note, this is a lean, not a “Roman chair”.
The exercise involves squeezing the quadriceps, lifting toes toward the nose, and engaging the tibialis anterior muscle. If you’re wondering what to do with your hands, they can be held out with palms open to work on posture, or hanging by the sides. Do this for about 1½–2 minutes.
For more on all this, plus a visual demonstration, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
When Bad Joints Stop You From Exercising (5 Things To Change)
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What’s the difference between burnout and depression?
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If your summer holiday already feels like a distant memory, you’re not alone. Burnout – a state of emotional, physical and mental exhaustion following prolonged stress – has been described in workplaces since a 5th century monastery in Egypt.
Burnout and depression can look similar and are relatively common conditions. It’s estimated that 30% of the Australian workforce is feeling some level of burnout, while almost 20% of Australians are diagnosed with depression at some point in their lives.
So what’s the difference between burnout and depression?
Burnout is marked by helplessness and depression by hopelessness. They can have different causes and should also be managed differently.
Yuri A/Shutterstock What is burnout?
The World Health Organization defines burnout as an “occupational phenomenon” resulting from excessively demanding workload pressures. While it is typically associated with the workplace, carers of children or elderly parents with demanding needs are also at risk.
Our research created a set of burnout symptoms we captured in the Sydney Burnout Measure to assist self-diagnosis and clinicians undertaking assessments. They include:
- exhaustion as the primary symptom
- brain fog (poor concentration and memory)
- difficulty finding pleasure in anything
- social withdrawal
- an unsettled mood (feeling anxious and irritable)
- impaired work performance (this may be result of other symptoms such as fatigue).
People can develop a “burning out” phase after intense work demands over only a week or two. A “burnout” stage usually follows years of unrelenting work pressure.
What is depression?
A depressive episode involves a drop in self-worth, increase in self-criticism and feelings of wanting to give up. Not everyone with these symptoms will have clinical depression, which requires a diagnosis and has an additional set of symptoms.
Clinically diagnosed depression can vary by mood, how long it lasts and whether it comes back. There are two types of clinical depression:
- melancholic depression has genetic causes, with episodes largely coming “out of the blue”
- non-melancholic depression is caused by environmental factors, often triggered by significant life events which cause a drop in self-worth.
When we created our burnout measure, we compared burnout symptoms with these two types of depression.
Burnout shares some features with melancholic depression, but they tend to be general symptoms, such as feeling a loss of pleasure, energy and concentration skills.
We found there were more similarities between burnout and non-melancholic (environmental) depression. This included a lack of motivation and difficulties sleeping or being cheered up, perhaps reflecting the fact both have environmental causes.
Looking for the root cause
The differences between burnout and depression become clearer when we look at why they happen.
Personality comes into play. Our work suggests a trait like perfectionism puts people at a much higher risk of burnout. But they may be less likely to become depressed as they tend to avoid stressful events and keep things under control.
Excessive workloads can contribute to burnout. tartanparty/Shutterstock Those with burnout generally feel overwhelmed by demands or deadlines they can’t meet, creating a sense of helplessness.
On the other hand, those with depression report lowered self-esteem. So rather than helpless they feel that they and their future is hopeless.
However it is not uncommon for someone to experience both burnout and depression at once. For example, a boss may place excessive work demands on an employee, putting them at risk of burnout. At the same time, the employer may also humiliate that employee and contribute to an episode of non-melancholic depression.
What can you do?
A principal strategy in managing burnout is identifying the contributing stressors. For many people, this is the workplace. Taking a break, even a short one, or scheduling some time off can help.
Australians now have the right to disconnect, meaning they don’t have to answer work phone calls or emails after hours. Setting boundaries can help separate home and work life.
Burnout can be also be caused by compromised work roles, work insecurity or inequity. More broadly, a dictatorial organisational structure can make employees feel devalued. In the workplace, environmental factors, such as excessive noise, can be a contributor. Addressing these factors can help prevent burnout.
As for managing symptoms, the monks had the right idea. Strenuous exercise, meditation and mindfulness are effective ways to deal with everyday stress.
Regular exercise can help manage symptoms of burnout. alexei_tm/Shutterstock Deeper contributing factors, including traits such as perfectionism, should be managed by a skilled clinical psychologist.
For melancholic depression, clinicians will often recommend antidepressant medication.
For non-melancholic depression, clinicians will help address and manage triggers that are the root cause. Others will benefit from antidepressants or formal psychotherapy.
While misdiagnosis between depression and burnout can occur, burnout can mimic other medical conditions such as anemia or hypothyroidism.
For the right diagnosis, it’s best to speak to your doctor or clinician who should seek to obtain a sense of “the whole picture”. Only then, once a burnout diagnosis has been affirmed and other possible causes ruled out, should effective support strategies be put in place.
If this article has raised issues for you, or if you’re concerned about someone you know, call Lifeline on 13 11 14.
Correction: This article originally stated that depression is marked by helplessness and burnout by hopelessness, when in fact it is vice versa. This has been amended.
Gordon Parker, Scientia Professor of Psychiatry, UNSW Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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