What is allergy skin testing?
We suffer allergy reactions with the environment and with the food we eat. In an allergy skin test, a drop of a suspected allergen is pricked on the surface of the skin. The test is performed on the back or forearm. Many suspected allergens are tested at the same time. If you are allergic to one of the tests, you will have redness and swelling at the test spot. Positive reactions usually appear within 20 minutes. The delayed reaction usually disappears in 24 to 48 hours, but should be reported to the allergy doctor or nurse.