All about Allergy Testing

This article has been reviewed by Thanai Pongdee, MD, FAAAAI

Allergies often heat up in the summer, when allergens such as grass, mold and ragweed pollen bring on symptoms like watery eyes and sneezing. Outdoor picnics and activities can pose more serious dangers for people who are allergic to certain foods or stinging insects.

It may seem that discovering what you are allergic to is a guessing game. However, testing performed by an expert can diagnose what does and what does not trigger your symptoms. For example, you don’t have to get rid of your cat if it is actually mold that is causing your itchy eyes and throat. Once you know exactly what you are allergic to, you and your doctor will be able to develop a treatment plan to reduce or eliminate your allergy symptoms.

Should I be tested?
Many people with untreated allergy symptoms aren’t aware of how much better they can feel once their symptoms are properly diagnosed and managed. If you are troubled by any of these nagging symptoms, ask your doctor for a referral to an allergist:
• Itchy eyes, nose and throat
• Nasal congestion or runny nose
• Watery eyes
• Hives, itchiness or other skin conditions
• Abdominal pain or diarrhea after eating certain foods
• Severe reactions to insect stings

Types of allergy tests
Allergy tests are the best and safest way to tell exactly what triggers your symptoms. Common triggers include: dust mites, animal dander, molds, pollen, cockroach droppings, stinging insects, foods, latex and drugs.

Skin tests: This is the most common kind of testing. In this test, a small amount of allergen is placed on your skin, and this area is pricked or scratched. If you are allergic, you’ll experience a little swelling at the site of the prick test. Results of this test are usually available within 15 minutes.
Intradermal tests: Intradermal tests are more sensitive than prick tests, and may be used when prick test results are inconclusive. In this test, your allergist will use a syringe to inject some allergen under your skin.
Challenge tests: Challenge tests are sometimes used when a doctor suspects you have a food or drug allergy. In this test, patients eat or inhale a very small amount of possible allergens under the close supervision of an allergist. Do not try this test at home!
Blood tests: For this test, blood is drawn and then tested for allergies. This test costs more than some other tests. It will also take longer to receive your results.

An allergist has specialized training to perform and interpret allergy testing. Once you receive your test results, your allergist can work with you to develop a treatment plan to manage your allergies.

Did you know?
Skin testing combined with a physical examination and medical history of your symptoms is the most reliable, cost-effective and rapid approach to determining what you are and are not allergic to.

To the Point
Beware of alternative allergy testing methods such as IgG testing, home allergy testing kits, applied kinesiology and skin titration. The AAAAI does not believe these tests are useful or effective. Contact an allergist / immunologist for appropriate testing to help you feel better and live better.

The AAAAI's Find an Allergist / Immunologist service is a trusted resource to help you find a specialist close to home.

AAAAI - American Academy of Allergy Asthma & Immunology