Spring is the season of recovery but the high incidence of asthma. There are several reasons for this: 1. Spring weather is hot and cold, which can easily cause respiratory infections and induce asthma. 2, various plant pollen particles floating in the air in spring, asthma patients inhale pollen sneezing, runny nose, nasal itch, cough, causing asthma attacks. 3. A small insect called “mite” grows in the dust, and the temperature and humidity in spring are suitable for their growth and reproduction. Asthma patients inhaling dust with a large number of mites can cause asthma attacks. According to these characteristics in spring, we suggest asthma patients to: 1) “cover the spring and freeze the fall”, pay attention to keep warm to avoid catching cold and cold and cold air stimulation to trigger asthma. 2) Try not to go to crowded places. 2. Try not to go to places where people gather, such as stores, theaters and parties, to avoid cross-infection. 3.Do not go to gardens and botanical gardens to enjoy the flowers. Around noon is the time when the concentration of pollen in the air is high, so you should minimize going out or wear a mask when you go out. 4. Keep the room warm and dry, pay attention to ventilation and light, and wash and dry bedding regularly to reduce the growth of dust mites and molds. Most of the factors that cause the onset of asthma are difficult to avoid completely, so timely preventive treatment is very important. Start inhaling corticosteroids such as budesonide, fluticasone, etc., or taking oral anti-allergy drugs such as ketotifen, cetirizine, etc. before the prone season.