There are a variety of tests that can be used to diagnose allergies in rhinitis, including:
Skin Prick Test
A Skin Prick Test (SPT) is a simple and safe way to identify the allergens that cause your rhinitis. During the test, tiny amounts of allergens are placed on the skin and a small prick is made in the skin with a needle. If you are allergic to a particular allergen, a raised red bump will form at the site of the prick.
Blood Test
A blood test can also be used to diagnose allergies in rhinitis. During the test, a sample of your blood is taken and tested for IgE antibodies to specific allergens. If the test detects IgE antibodies, it means that you are allergic to the allergen.
Patch Test
A patch test is a type of allergy test that can be used to diagnose rhinitis. During the test, a patch containing one or more allergens is applied to your skin. The patch is left in place for several hours and then removed. If you are allergic to a particular allergen, a rash or other reaction will develop at the site of the patch.
Other Tests
Other tests that may be used to diagnose allergies in rhinitis include nasal smears, spirometry, and allergy shots. Your doctor can discuss which tests are right for you.