Main principles: avoidance of allergens; medication; immunotherapy. 1. Avoid and remove allergens Remove allergens from the living environment or stay away from the living environment with allergens as much as possible. For example, you should ventilate your living room, watch TV at an appropriate distance, try cosmetics before using them, avoid eating allergic foods and medicines, avoid using allergic items, avoid wearing allergic clothing, avoid going to environments with high allergy levels, etc. Nevertheless, it is very difficult to avoid allergens completely in life, such as cold air, pollen, dust mites, etc. 2. Drug treatment includes systemic application of antihistamines and hormonal drugs, and nasal hormones. 3. Specific immune (desensitization) therapy Desensitization therapy, using the identified allergens (i.e., allergic to what substances) as desensitizers, the beginning are used in small doses for subcutaneous injection, and gradually increase the dose to the maximum tolerated amount to the maintenance amount, until the symptoms disappear. Patients treated by this method, the body can produce a large number of specific IgG closed antibody, can block the combination of antigen and IgE antibody, reduce the sensitivity of the media cells, so as to play a therapeutic role, desensitization therapy is the current method of allergic rhinitis has a certain effect. However, the fact that there may be many allergens often limits its effectiveness. The accuracy of allergen detection, whether the antigen used for desensitization is a standardized antigen, and the experience of the clinician are very important. Otherwise, it is difficult to achieve the desired therapeutic effect. Allergic reactions are triggered by many external factors (allergens), but the internal cause is the allergic body. Allergic reactions occur only when allergens are applied to people with allergies. Allergic patients generally have inherited allergies. Many patients with allergic diseases have a family history. Adjusting the allergic constitution through a combination of Chinese and Western medicine is one of the fundamental treatments for allergic diseases. Allergic diseases such as food, drugs, cold air, ultraviolet light, etc., which cannot be treated by desensitization, can be treated by adjusting the allergic constitution.