Keep the room clean and dust-free to reduce allergens, clean the room frequently with a vacuum cleaner or wet rag (patients avoid such labor); control indoor mold and mildew. 1.Clean with bleach, use bleach or other cleaners to clean the above mentioned bathroom and garbage bins. 2, If mold occurs on clothing throw it away as soon as possible, or treat it as appropriate to remove the mold. 3.Keep dry. Carpets should be protected from moisture and books, newspapers and clothing should be kept dry and ventilated. Food should also be stored reasonably to prevent mold. 4, room and balcony is best not to have often need to water the shade-loving plants, moist soil may hide a lot of mold. 5. Thoroughly kill cockroaches and other pests; cockroaches mostly grow in warm, hot and humid environments and are prevalent in offices and living rooms. The protein in cockroach excreta is an important substance that causes allergic rhinitis and asthma, and patients living in crowded rooms and cities should pay more attention to it.