A full allergy test is a diagnostic tool that helps identify what substances, known as allergens, are causing an allergic reaction in an individual. Allergy testing typically includes either skin prick tests or blood tests. Skin prick tests involve placing a small amount of allergen extract on the skin, usually on the arm or back, and then lightly pricking the surface of the skin to allow the extract to penetrate. The reaction of the skin to the allergen is then observed for signs of an allergic response, such as redness, swelling, or itching. Blood tests for allergies, such as the RAST test or ELISA, measure the level of allergen-specific antibodies in the blood. These tests provide a more systematic and in-depth analysis of an individual's immune system's response to allergens. The results of a full allergy test can help diagnose an allergy, determine the severity of the allergy, and guide recommendations for treatment and management. These might include avoiding specific allergens, taking medication, or undergoing immunotherapy. Overall, a full allergy test is an important tool for understanding and managing an individual's allergies. It is important to discuss the best type of test and the most appropriate testing method with a healthcare professional.