Patch Testing

Patch testing can help determine any allergies to food, latex, drugs, metals, bees, and ingredients in cosmetics, as well as airborne allergens such as pollen, dust, mold, and pet dander.

During patch testing, your allergist will place patches on your back or arm, and in 48 hours, you’ll return to have the patches removed. During the 48 hours, the patch exposes your skin to a small dose of specific allergens to test for a reaction. This helps your allergist know what you might be allergic to, in order to form a treatment plan. Irritated skin under a patch may indicate a reaction to a particular allergen. Sometimes medications interfere with results, so when you make your appointment, mention anything that you take. Your allergist may ask you to temporarily discontinue medications to prepare for your test.