Doctor insights on:
Causes Of Urticaria Allergy
Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more
Yes: Patch testing can detect certain types of food allergies. For anaphylactic type (ige mediuated) food allergies, standard skin prick testing or specific ige blood tests are better at identifying food allergies. For other non-ige mediated reactions such as eosinophilic esophagitis, patch testing can identify some additional food sensitivities. Only have test recommended by a trained md. ...Read more
Easy: Skin testing for pollen allergy entails: cleaning the skin with alcohol, number the skin to keep track of the different allergens tested, a "prick" with skin test device that has a drop of the allergen on the tip and then waiting 15-20 minutes to see if a reaction occurs. The skin test feels like a mosquito bite it is really quite painless. ...Read more
Allergy testing: Only physicians trained in the specialty of allergy, asthma ; immunology are trained in a monitored situation during residency to perform skin testing for ige-mediated allergy. Some ENT programs are adding this to their training. If you were skin tested by a non-specialist, consult a specialist, if you were skin tested by an allergist, it is likely that you are unusally allergic. ...Read more
Releasing histamine: Hives are due to a release of histamine in the skin, commonly due to allergy to foods, medicines, viruses, molds, animals, pollens, etc... Some people release histamine and get hives when exposed to cold temperatures, cold water, sunshine, stressful situations, etc... Other people with hives may have internal medical conditions such as chemical imbalances, intestinal parasites, etc... ...Read moreSee 1 more doctor answer
No: Appropriate allergy testing is guided by the patients history and physical examination. Based upon this one's allergist will make a decision what to be tested for. The test, particularly for outdoor allergens is based upon the common allergens is that particular agricultural zone. Does this mean that all allergens will be tested no. ...Read more
Positive or Negative: A positive skin or blood test for allergy to shellfish is enough evidence to diagnose an allergy if you have a convincing history of allergic reaction to shellfish. If the history is inconclusive, a blinded food challenge can be performed to help confirm the diagnosis. If you are diagnosed with shellfish allergy, you are at risk of a life threatening reaction. There is no test for severity. ...Read moreSee 3 more doctor answers
That's curious....: Allergic reactions are when the body's immune system detect something that it recognizes as a foreign substance (ingested, contact through skin, food or medicine, or in the case of auto-immure diseases, it's own cells). One reax is to mobilize cells that secrete anti-histamines to fight the allergic reax. So, allergic relax to antihistamine would be very unusual. Let detective doc sort this out. ...Read moreSee 2 more doctor answers
Patch Test: Basically it places the skin in contact with multiple different substances each separated in a grid pattern. When one causes a reaction we can differentiate it from the others that did not cause one. ...Read more
Acute allergy.: There are actually different types like the delayed ones. The common ones are the acute allergic reaction. You have allergy cells (eosinophils, basophils, mast) with receptors on the surface. The allergen (the cause) binds to those receptors, the cells lyse, recruit other cells, but the contents cause the blood vessels and surrounding tissue to react and cause the wheal and flare reaction. ...Read more
I suspect an allergy to Benadryl (diphenhydramine) altho it's rare. Is there a test for this type of allergy to confirm? I get hives.
Allergic sensitivity: Allergic rhinitis is most commonly due to sensitization to pollens (tree, grass or weeds), animal dander, or dust mite; and even some indoor sensitizers like cockroach, mouse or fungi. The body makes "allergic antibody", or IgE, against the allergen. When inhaled/deposited on the mucosa, immune cells in the nose become activated causing the typical constellation of symptoms. ...Read more
Yes: Skin allergy testing can check for number of allergens. These include environmental and food allergens. ...Read more
Immunologic: An allergic reaction is the body's immunologic response to a substance (typically a protein) that it determines is "foreign." the body's th2 type of t cells interacts with b cells that produce ige antibodies. When ige antibodies that are present on mast cells subsequently encounter the allergen, the mast cell releases histamine and other chemical mediators that lead to the symptoms of allergy. ...Read moreSee 1 more doctor answer
Drug reactions: The most common drug allergic reactions are to antibiotics like penicillin and sulfa. The second most common drug allergic reactions are Aspirin and nsaids such as ibuprofen. It is also very common for narcotics (morphine, codeine, demerol, (meperidine hydrochloride) etc) to cause itching and hives. ...Read moreSee 1 more doctor answer
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