Questions tagged [allergy]

Questions pertaining to a damaging immune response by the body to a substance, esp. pollen, fur, a particular food, or dust, to which it has become hypersensitive.

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2k views

Can someone have an allergic reaction to a virus?

My understanding of allergies is that they are more or less immune responses to non-pathogenic substances. The definition on MedicineNet more or less agrees with this. While I don't have any known ...
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20 views

Allergy test for specific allergens

Let's say I order an allergy blood test. The test will, for example, test for White Oak (Quercus alba). Would a positive result for that specific allergen indicate, broadly speaking, a ...
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Which is the best test to confirm a Lidocaine allergy?

As per my study, there are two tests which are performed to confirm/dispute a Lidocaine allergy. Patch test Intradermal Test Which is the most conclusive of the above? Are there any other tests?
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Can foods one is not allergic to exacarbate atopic dermatitis?

Several physicians (incl. two profesors in allergology, regarded among highest authorities in allergology in my country) told me and insisted that people with atopic dermatitis must avoid certain ...
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Covid vaccine side effects [closed]

The Pfizer Covid vaccine caused allergic reactions. For patients that are deemed to be at an increased risk of adverse side effects following a risk assessment (e.g. because of diabetes, heart disease)...
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Why do we need histamines - If the allergen does not really bother you?

I must begin with the fact that I am not a physician nor a soon to-be one, I ask this question in a naïve and not-so-professional way because I don't want to mislead anyone - the examples and ...
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How long can it take for an alpha-gal allergy to develop after a tick bite?

Can symptoms start months after a tick bite or would the allergy develop within days or weeks? Edit: I have tried the below sources for information: ▷ Google alpha gal allergy development time from ...
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Is city air pollution causes allergy?

Is there any evidence (study) which shows correlation with city air to allergy (to anything) or any other breath health problems? If yes is this correlation different if someone lives in big city ...
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Palatal itching and rhinitis

It is a common finding among people that palatal itching is usually followed by rhinitis. In a study it was found that palatal itching and allergic rhinitis are related. My question is that why does ...
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118 views

Seboorrheic Dermatitis, Fungi, Environmental Factors

How can seborrheic dermatitis not be caused by poor hygiene as the assotiation for dermatology said? Wouldn't poor hygiene at least aggravate the condition? The treatment is mainly antifungal. And ...
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17 views

Food allergy and weight loss

I have red a lot of articles about excluding products that causes allergy can help people lose weight. But is it possible that having allergy on some products and eating them often could result in not ...
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Can a runny nose "Shoot Blanks"?

Every time i have a runny nose I'm comforting myself by thinking "It's ok, the body is getting rid of pathogens now" But is that really the case ? does every 'drop' of nasal mucus contain pathogens ?
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Are type 2 hypersensitivities autoimmune diseases?

I'm learning about hypersensitivities and it seems to me that all type 2 hypersensitivities are autoimmune diseases; also all examples of type 2 hypersensitivity I've heard so far are also classified ...
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1answer
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Are non-allergic, non-pathogenic rhinitis associated with fever?

Among common causes of rhinitis are irritants weather changes infection (e.g. common cold) allergy (e.g. hay fever) One way to disentangle between infection and allergy in presence of rhinitis is by ...
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Why is the H2O molecule an antigen despite its tiny size and simplicity? [closed]

I just saw a news article about a woman with Aquagenic Urticaria which basically means she produces antibodies against H2O molecules which causes very bad symptoms if she touches or drinks water. We'...
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1answer
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Why would someone have an anaphylactic reaction to intravenous saline?

https://www.sciencedirect.com/science/article/pii/S073567570800332X Abstract Anaphylaxis and acute allergic reactions may sometimes be fatal. They occur within minutes in a sensitized individual. ...
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168 views

Rising allergy and intolerance diagnosis rates

A leading theory behind the rising allergy and intolerance diagnosis rates is the "hygiene hypothesis." This theory suggests that living conditions in much of the world might be too clean and that ...
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182 views

Which conditions are associated with (multiple) food allergies?

Most people with food allergies are allergic to one or few foods, but allergies to more than three foods are relatively rare (PubMed, 2010). In some people who are allergic to several foods, an ...
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Is there solid evidence, that antibiotics cause allergies?

I have read, that the use of antibiotics could be part of the reason for the increase in allergies, we see today. In alternative medicine circles, it is a common theme to reduce the use of ...
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Is there such a thing as "histamine liberators" and how do they work?

In the context of allergies, I keep reading the term "histamine liberators" with claims that certain foods release histamine. A random example from everydayhealth.com: Some foods, while low ...
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Is there a way to measure allergy to tablet/pill ingredients?

It looks like I have some kind of allergy to tablets/pills. It doesn't matter which type I take (I used to take mainly vitamins). If I take some, the result is vary from bearable sickness (for 2 days)...
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27 views

Does increasing “allergy” histamine affect “wake” histamine? Do both respond to the same triggers?

I understand that histamine is used by the body as part of the immune response, widening blood vessels, etc., to aid the white blood cells in their attack. Often this ends up helping them attack ...
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Is it possible to be allergic to corn but not popcorn?

Is it possible for a person to be allergic to one subspecies and not another of the same parent species? For instance, can a person be allergic to sweet corn but not popcorn (both subspecies of Zea ...
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1answer
251 views

How would I know whether I am lactose-intolerant? Are there any tests?

I suspect that I might be lactose-intolerant, but I don't know how to tell. Can I just see a doctor and get tested, or do I have to live with the assumption? If there are any standardized tests, how ...
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84 views

Cold allergy is it possible?

This may be a impossibility but here goes, is it possible to be allergic to cold temperatures? If it’s possible then it’s UBER rare granted, but still it might be possible non the less. If it helps I ...
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284 views

How long would someone be able to live if they suddenly became allergic to water?

Inspired by this tale - https://www.thefreelibrary.com/JUST+ONE+CUP+OF+WATER+COULD+KILL+LITTLE+HEIDI%3B+Girl%27s+deadly+allergy...-a061152595 Let's say someone is so allergic to H2O that a sip of ...
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What is an allergy?

Is an allergy a negative response to a molecule that the majority of the population doesn't have? I've heard that people can be allergic to lactose, which the majority of people aren't, while people ...
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41 views

How to deal with dehydrating medicine

If a person is dehydrated by something that cannot be gotten rid of, and drinking a lot of water solves some parts of dehydration but not others, due to losing the water by freqent urination, what ...
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106 views

Does early exposure protect against developing allergies later on in life?

I recently read a few papers (here and here) that concluded that children exposed to peanuts before 1 year of age were less likely to develop peanut allergies later in life than children who were not ...
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2answers
177 views

How low can you go on a low salt diet? [closed]

I'm sensitive to salt and am considering doing a salt-free diet. Is it ok if I remove salt and seasonings from my diet and cooking altogether? Will the sodium content of natural foods like oats, milk, ...
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289 views

Possible side effects of deer antler velvet

My doctor suggested I try deer antler velvet. But I am not sure about it. Does deer antler velvet have any side effects? Does it help growth? Are there any scientific studies about it?
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How credible is negative result of allergic skin tests?

Allergic tests performed a year ago confirmed I am not allergic to a cat. However, there a few signals that make me doubt in credibility of the test results: I felt much better (less sneezing, less ...
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Are allergies due to memory T cells for benign antigens?

If I understand correctly, the immune system reacts to infections by priming virgin helper T cells for the particular antigens exposed on the surface of the invader, leaving some memory T cells ...
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Truth or fiction: Testing vitamins to take by holding them and assessing strength

I'm a Ph.D. candidate in molecular biology and cannot convince my indoctrinated mother and grandmother that you cannot determine whether or not you need to take a vitamin by simply holding it and ...
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Factors affecting the severity of an allergic reaction

I share a house with two very furry guinea pigs and inconveniently, am also very allergic to them. Every morning I take an anti-allergy tablet as I’m well aware that I’m likely to come into contact ...
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Are "latex fruit intolerance/syndrome" and "histamine intolerance" related or otherwise two names for the same problem?

I have an intolerance to bananas and avocados without a doubt. I get bowel cramps, bloating, and if I eat way too much of those foods, some mild topical itching on my skin. My research for latex ...
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524 views

Is there a shampoo that does not contain SLS or cocamidopropyl betaine?

If there is someone who is allergic to cocamidopropyl betaine and concerned about skin irritation from SLS (Sodium Lauryl Sulfate), is there a resource that shows shampoos without these ingredients?
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1answer
51 views

How to discover allergies to certain foods?

Sometimes it is hard to find food allergies. Wheezing or any side affects but the root cause may not be known. Is there a good way to find food allergy?
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How long can an allergic reaction last after exposure to an allergen?

My dad has a skin allergy (rashes, itchiness), and I want to cut out some things from his diet to see if it's causing the problem. But I don't know how long an allergic reaction can last in absence ...
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What shots are not okay for someone with egg allergies?

I have heard that flu shots generally are manufactured in eggs or chicken embryos, and so there can be an issue for people who are allergic to eggs. What other shots should people allergic to eggs ...
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Should all the stuff be thrown away when moving out from a house with mold?

Can anything from a molded house be safely moved to a new house without any further harm for health? Can spores be wiped out from clothes and furniture?
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Food Packaging Labels' Ingredient Statement Required To List Allergens?

I discovered recently I am allergic to soy and have been looking at the labels on many foods I eat to discover it's in almost all the foods I eat. Some don't seem to make any sense - like raw walnuts ...
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how does the immune system identify allergens? application: varenicline and lobeline

I'm wondering if we know how the immune system identifies allergens. My biochemistry knowledge is basic so I apologize if I use concepts incorrectly! Specifically, I want to know about the likelihood ...
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Is there any evidence for the idea that eating too many nuts makes you allergic?

I occasionally come across the idea that eating too many of a particular nut or other food substance will give you an allergy to it later. An example might be: http://www.peanutallergy.com/boards/can-...
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590 views

Taking Benadryl after Claritin

I take Claritin in the mornings. Right now in the evening my eyes are itchy and I'd like to take Benadryl. Is this a good idea or not? Thanks!
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What causes asymptomatic itching with rarely distributed rash?

Preface: I am not a student of medicine or a medical professional by any means. All uses of anatomic and biologic terms come from a general education plus a little hobby-knowledge. Misuses of such ...
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Is immunotherapy effective against allergies?

I have been suffering from allergies for years and I have recently seen an allergist. I was told that I would be a good candidate for immunotherapy. However, it is not an inexpensive process and a ...
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Cleaning to rid house of cat allergen after cat is gone

We discovered through a blood test that our 3yo is severely allergic to cats. We have two cats who are 7 and 8 respectively and we're adopted as kittens. So their hair and dander is all over ...
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Long term effects of an allergy pill? Loratadine

Are there any studies/effects of long term use of an allergy pill? I use Loratadine to help control my environmental allergies but I'm concerned about it being an every-day thing. Am I facing any ...
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Should Neosporin never be used?

I read on https://millerfamilydermatology.com/things-that-are-forbidden-in-my-house/ (mirror): 1 Neosporin® Neosporin is a combination of 3 different topical antibiotics-Neomycin Sulfate, Polymyxin ...