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When will your doctor use blood test to diagnose allergy?

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If you take medicine that could affect allergy test results, have sensitive skin, or have had a bad reaction to a skin test, your doctor might do a blood test instead.

A sample of your blood is sent to a lab, and your doctor will get the results within a few days. This is typically more expensive than a skin test.

From: How Does a Doctor Diagnose an Allergy? WebMD Medical Reference

SOURCES:

American College of Allergy, Asthma and Immunology: "Allergy Testing," "Diagnosing Allergies."

American Academy of Family Physicians: "Colds and the Flu: Tips for Feeling Better."

Cleveland Clinic: "Allergies," "Allergy Overview," "Allergy Tests."

Food Allergy Research and Education: "Food Elimination Diet," "Oral Food Challenges."

Kidshealth.org: "Allergy Testing," "How Do Doctors Test for Allergies?" "Serious Allergic Reactions (Anaphylaxis)."

Reviewed by Sabrina Felson on February 08, 2019

SOURCES:

American College of Allergy, Asthma and Immunology: "Allergy Testing," "Diagnosing Allergies."

American Academy of Family Physicians: "Colds and the Flu: Tips for Feeling Better."

Cleveland Clinic: "Allergies," "Allergy Overview," "Allergy Tests."

Food Allergy Research and Education: "Food Elimination Diet," "Oral Food Challenges."

Kidshealth.org: "Allergy Testing," "How Do Doctors Test for Allergies?" "Serious Allergic Reactions (Anaphylaxis)."

Reviewed by Sabrina Felson on February 08, 2019

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How does your doctor diagnose food allergies?

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