Skip to content

Allergies Health Center

Select An Article

Testing for Food Allergies

    Font Size

    You may know exactly which foods you’re allergic to. But if you or your child have food allergies and aren’t sure which foods are to blame, allergy testing can help you identify them.

    Make an appointment with a board-certified allergist. First the doctor will ask you questions about what you think you’re allergic to and your symptoms. Sometimes that’s enough to identify the problem food, or he may suggest allergy testing.

    Recommended Related to Allergies

    Living With Severe Allergies

    Allergies affect more than 50 million people in the United States -- the poor souls who sniffle, sneeze, and get all clogged up when face to face with the allergen (or allergens) that set them off. For many, allergies are seasonal and mild, requiring nothing more than getting extra tissue or taking a decongestant occasionally. For others, the allergy is to a known food, and as long as they avoid the food, no problem. But for legions of others adults, allergies are so severe it interferes with...

    Read the Living With Severe Allergies article > >

    Allergy testing can help your doctor figure out what you're allergic to, but it's not foolproof. After your tests are done, you'll need to work with your doctor to get the right diagnosis.

    Skin Testing or Skin Prick Test

    Skin testing is the most common and quickest food allergy test. Your doctor can test you for several foods at the same time.

    First, the doctor puts a very small drop of liquid containing the food on your skin and pricks it. Then the doctor will watch for a reaction – a small bump that may get red like a mosquito bite.

    If your skin reacts, you’re likely allergic to that food. You’ll want to avoid it and your doctor can talk with you about other treatment options. If you don’t react, good news! You’re probably not allergic to that food.

    BloodTests for Allergies

    For this test, your doctor will take a sample of your blood and expose it to different types of allergens. You won’t learn the results right away. This test is often sent to a lab and results could take a week or more.

    Doctors don't use it as often. They may use it if they have an idea of what you’re allergic to and it is only one or two specific things. Or they use this test if they are worried you have a severe allergy. That way, you don’t have to be exposed to the possible trigger.

    Neither skin nor blood tests can accurately predict how severe a food allergy reaction may be.

    A Controlled Food Challenge Test

    Next Article:

    Today on WebMD

    man blowing nose
    Make these tweaks to your diet, home, and lifestyle.
    Allergy capsule
    Breathe easier with these products.
    cat on couch
    Live in harmony with your cat or dog.
    Woman sneezing with tissue in meadow
    Which ones affect you?

    blowing nose
    woman with sore throat
    lone star tick
    Woman blowing nose

    Send yourself a link to download the app.

    Loading ...

    Please wait...

    This feature is temporarily unavailable. Please try again later.


    Now check your email account on your mobile phone to download your new app.

    cat lying on shelf
    Allergy prick test
    Man sneezing into tissue
    Woman holding feather duster up to face, twitching