Allergies and intolerances may trigger various skin conditions. Allergy testing through blood tests can be used to determine their causes.
A sample of blood is drawn and then tested against a set of allergens. There are standard profiles for common cases, such as allergens that provoke eczema, or popular intolerances like shellfish. Individual allergens you suspect may be a problem can also be tested.
Patch testing may be helpful if you're experiencing skin conditions that are triggered by being in contact with certain substances. A series of patches are applied to your back or hand with minute quantities of a suspected substance under each patch. The patches are removed after three days and a reading is taken, followed by a second reading two days after the patches were removed. Once the elements that you’re allergic to are identified, you can work to eliminate your contact with those substances in order to manage the allergies