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How is a skin puncture test used to diagnose food allergies?

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If your history, diet diary, elimination diet, or oral food challenge suggests a specific food allergy is likely, the doctor may use tests that can more objectively measure an allergic response to food. One of these is a scratch puncture test. This involves a doctor placing a diluted extract of the food you're reacting to on your skin. Most likely, it will be placed on your forearm or back. Your doctor will puncture your skin through the extract with a needle and observe you for the swelling or redness that would indicate a local allergic reaction.

From: Food Allergy and Food Intolerance WebMD Medical Reference

SOURCES:

The National Institute of Allergy and Infectious Diseases: "Fact Sheet: Food Allergy and Intolerances."  UpToDate. American Academy of Allergy Asthma & Immunology.

Reviewed by Brunilda Nazario on October 29, 2018

SOURCES:

The National Institute of Allergy and Infectious Diseases: "Fact Sheet: Food Allergy and Intolerances."  UpToDate. American Academy of Allergy Asthma & Immunology.

Reviewed by Brunilda Nazario on October 29, 2018

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How are skin tests used to diagnose food allergies?

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