Scratch test for allergy

View 10 Common Allergy Triggers

Medical Definition of Scratch test for allergy

Scratch test for allergy: A test in which a small drop of the suspected allergy-provoking substance (allergen) is placed on the skin and the skin is then gently scratched through the drop with a sterile needle. If the skin reddens and, more importantly, if it swells, the test is read as positive, and allergy to that substance is considered probable.


Quick GuideCould I Be Allergic? Discover Your Allergy Triggers

Could I Be Allergic? Discover Your Allergy Triggers

Subscribe to MedicineNet's Allergy and Asthma Newsletter

By clicking Submit, I agree to the MedicineNet's Terms & Conditions & Privacy Policy and understand that I may opt out of MedicineNet's subscriptions at any time.

Reviewed on 7/1/2016

Health Solutions From Our Sponsors