Many people end up discovering allergies on their own by coming into contact with something they didn’t know they were allergic to. But, if you’re unsure whether a substance is an allergen, allergy testing is a way to help pinpoint the culprit. A simple blood or skin test can determine what’s causing that itchy throat or patch of hives. You can test for allergies to things like, pollen, molds, animal dander, foods, bug bites and some medicines. Food allergy testing can be especially helpful since most meals include a variety of different foods, making it hard to know what exactly causes a reaction. Visiting an allergist can help you pick the right test and answer any questions you have.