Allergic rhinitis is necessary to check for allergens. Allergic rhinitis, also called allergic rhinitis, is a rapid metamorphic reaction of the sensitive body caused by contact with allergens. Allergic rhinitis check allergens have the following necessities: First, clinical diagnosis, according to the typical symptoms, such as paroxysmal sneezing, nasal itching, watery runny nose and nasal congestion diagnosis can only be a preliminary diagnosis, the clinical diagnosis must have a positive result of the allergen test. Second, allergic rhinitis is a disease that can not be completely cured, only to avoid re-exposure to allergens may be cured, clear allergens can be targeted to avoid contact. Third, in order to specific immunotherapy, that is, desensitization treatment.