As society advances, the incidence of allergic diseases (e.g., eczema, asthma, allergic rhinitis, food allergies, etc.) in children is increasing significantly, and thus the detection of allergic diseases has been emphasized. Testing for allergic reactions is a very important prerequisite for the treatment of allergic reactions and is of great significance. 1, only clear allergens, can be targeted to take measures to avoid. 2, can be early to determine the future may develop Zhang become allergic disease of high-risk infants; 3, clear allergens, allergic disease of children targeted drug therapy, for children with indications to take specific allergen vaccine treatment (desensitization therapy).