There are several methods that doctors use to test for allergies, and the most appropriate method will depend on the suspected allergen and the individual's symptoms. Some of the most common methods include:
Skin Prick Test: The skin prick test is a common and quick method used to test for allergies.
Blood test: Blood tests, such as the RAST (RadioAllergoSorbent Test) can be used to test for allergies.
Patch test: A patch test is used to test for allergic reactions to substances that come into contact with the skin.
Intradermal Test: similar to skin prick test but the allergen is injected into the skin by a needle.
Challenge Test: is a diagnostic test where a doctor will give you a small dose of the allergen, and monitor your reaction.
It's important to note that no single test can diagnose all allergies. A combination of tests and a careful review of symptoms and medical history are usually needed to make a diagnosis.
For additional information on allergy testing