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What do negative results mean in an allergy blood test?

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A negative result means your immune system doesn't respond to the allergen tested, and you probably don't have a true allergy. But it's possible to have a normal (negative) allergy blood test result and still have an allergy.

An allergy specialist should interpret your results. Your doctor will also consider your symptoms and medical history when diagnosing a specific allergy.

SOURCES:

American College of Asthma, Allergy, and Immunology (ACAAI): "Allergy Testing."

Lab Tests Online: "Allergy Blood Testing."

Asthma and Allergy Foundation of America: "IgE's Role in Allergic Asthma."

UpToDate: "Overview-of-in-vitro-allergy-tests."

Reviewed by Nayana Ambardekar on January 19, 2020

SOURCES:

American College of Asthma, Allergy, and Immunology (ACAAI): "Allergy Testing."

Lab Tests Online: "Allergy Blood Testing."

Asthma and Allergy Foundation of America: "IgE's Role in Allergic Asthma."

UpToDate: "Overview-of-in-vitro-allergy-tests."

Reviewed by Nayana Ambardekar on January 19, 2020

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What are the signs of a more serious reaction to poison ivy, oak, and sumac?

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