Skip to content

    Allergies Health Center

    Font Size

    Blood Testing for Allergies

    Blood tests can help you find out if a reaction you’re having is because of an allergy.

    They’re often used instead of the more traditional skin test if you have a skin condition or if you're taking medications, like antihistamines, which interfere with those tests.

    Recommended Related to Allergies

    Fragrance Allergies: A Sensory Assault

    Do any of these scenarios sound familiar? You catch a whiff of a co-worker's new fragrance, and within minutes, you have a whopper of a headache. You pop open that new bottle of dish-washing liquid, and by the time you've washed the pots and pans, your hands and arms are covered in hives. You walk into a friend's home and smell freshly baked pumpkin pie. Only after you start sneezing uncontrollably and feeling dizzy, weak, and sick to your stomach do you learn she hasn't been baking --...

    Read the Fragrance Allergies: A Sensory Assault article > >

    You may hear it called an IgE (or sIgE) test.

    A small amount of your blood is taken and analyzed. A lab checks for proteins called antibodies that your immune system might make in response to something you’re allergic to.

    These blood tests may not give you results as specific as those from a skin test. They also tend to be more expensive.

    Talk to your doctor to see if they're the right thing for you to get to the bottom of your allergies.

    WebMD Medical Reference

    Reviewed by Brunilda Nazario, MD on April 25, 2016

    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