How long it takes to get your allergy test results will be dependent on the type of allergy test performed. Skin prick allergy tests provide almost immediate results, as the skin is observed, and any reaction noted 15 minutes after the allergen is placed on the skin is recorded. This means that you can leave the doctor’s office from your allergy test appointment knowing which allergens are triggering you to have an allergic reaction. Other tests can take longer to get the results, with blood tests and patch tests taking a few days for results. Challenge tests and intradermal tests will also provide immediate results, although these tests may need to be repeated over a series of appointments to try multiple allergens to pinpoint which allergen is causing the reaction.