Allergy tests are used to determine what substances trigger an allergic reaction in a person. The common types of allergy tests are skin tests, elimination-type tests and blood tests. Skin tests are most useful for diagnosing food, pollen, animal, mold, penicillin, venom and allergic contact dermatitis.
"Doc, I think I'm allergic to cottonwood tree. Every summer I start sneezing my head off when those "cotton things" start floating around in the air." Every year in May or June a few people ask me about cottonwood allergy after noticing their eye and nasal symptoms escalate as the cottonwood tree molts its seedlings. But this is a…