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Doctor insights on: What Is An Allergy Skin Prick Or Scratch Test

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What is an allergy skin prick or scratch test?

What is an allergy skin prick or scratch test?

Quick easy test: Allergy skin testing using the prick, puncture or formally known as scratch test is the preferred method to assess for food or environmental allergies. It can be accomplished quickly and safely in the allergist's office and the result is known in 20 minutes. If it is positive, the site where the allergen was place will appear and feel like a mosquito bite. Newer skin test devices have less pain. ...Read more

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Dr. John Chiu
2,479 doctors shared insights

Allergies (Definition)

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


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2 days ago got tested for allergies (scratch test) only spots w/reaction were histamine+mold. Now there are red spots (not the pricks) itchy, causes?

2 days ago got tested for allergies (scratch test) only spots w/reaction were histamine+mold. Now there are red spots (not the pricks) itchy, causes?

ST reaction: The skin test response to allergen may start within minutes followed by a delayed response from 2-8 hrs later. The delayed reaction may linger for a few days. However the reaction consists usually of a raised wheal and not just redness. Are your red spots raised or flat? ...Read more

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How accurate is an allergy scratch test?

How accurate is an allergy scratch test?

Allergy skin test: Allergy skin tests in the hands of a trained allergist are very helpful in determining the most likely causes of allergy symptoms. No test is perfect, and sometimes allergy tests can miss allergies and sometimes they can cause them to be overdiagnosed. That's why you need a doctor to take your history and interpret the test together with all the information about your symptoms and activities. ...Read more

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What exactly is an allergy scratch test?

What exactly is an allergy scratch test?

Best allergy test: Scratch or prick skin testing is the primary skin test method used by allergists. A drop of the material in question is put on the surface of the skin and a small pointed device is used to prick the skin surface exposing a very small amount of the material (antigen) to the subject. If the person has sufficient numbers of sensitive mast cell a hive appears due to histamine released = positive test. ...Read more

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How long does a allergy scratch test take?

How long does a allergy scratch test take?

1 sec and 20 min: Putting on the test takes 1 or 2 seconds. You then wait 20 minutes to have the tests read. ...Read more

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What is an allergy scratch test for?

Tests for allergies: Allergy scratch tests are used to assess whether or not you are allergic to pollen, mold, pets, dust mites, insects, foods, etc... ...Read more

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Is the scratch test for environmental allergies accurate and useful?

Is the scratch test for environmental allergies accurate and useful?

Incredibly: Skin prick testing is the most accurate way to test for environmental allergies. Blood testing is the 2nd most accurate although a far cry from skin testing. All other non-approved forms of testing............Well, i simply state, "let the buyer beware!" there is a reason insurance doesn't cover the non-approved methods... ...Read more

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Does an allergy scratch test test for mold and dust allergies?

Does an allergy scratch test test for mold and dust allergies?

Yes: Skin allergy testing can check for number of allergens. These include environmental and food allergens. ...Read more