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How do blood tests work for allergies?

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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.

From: Blood Testing for Allergies WebMD Medical Reference

SOURCES: 

Asthma and Allergy Foundation of America. 

The Food and Drug Administration (FDA).

Reviewed by Louise Chang on April 14, 2018

SOURCES: 

Asthma and Allergy Foundation of America. 

The Food and Drug Administration (FDA).

Reviewed by Louise Chang on April 14, 2018

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