Food allergen testing is the process of determining whether a person has an allergy to a particular food. This can be done through skin prick testing, blood testing, or both. Skin prick testing involves placing a small amount of the suspected allergen on the person’s skin and then pricking the skin to allow the allergen to enter. If the person is allergic, they will typically experience a raised, itchy bump at the site of the prick. Blood testing, on the other hand, involves taking a blood sample and sending it to a laboratory for analysis.