Bronchial asthma is a chronic, recurrent inflammatory disease of the airways. There are often a variety of triggers (also called triggers) for asthma attacks. Identifying and controlling triggers is an important step in the prevention and treatment of asthma. Avoiding and controlling triggers can prevent attacks, reduce symptoms, and decrease the amount of medication used, so it is called non-pharmacologic secondary prevention of asthma. Therefore, we should learn as much as possible about asthma triggers and actively prevent and treat asthma. Common triggers for asthma attacks 1. Allergens Indoor: room dust mites, animal allergens (such as saliva, birds, wild mice and rats, etc. that release allergens), cockroach allergens, fungi (molds and yeasts) Outdoor: pollen (such as tree pollen in early spring, grass pollen in late spring and summer, weed pollen in summer and autumn), fungi (molds and yeasts) 2. Occupational allergens 3, air pollution such as cigarette smoke, kerosene stove smoke, wood smoke, frying oil smoke, household sprays and cosmetics with irritating odors, the smell of interior materials, etc. 4, respiratory tract infections viral infections (such as colds) 5, weather changes such as cold, freezing, high humidity, thunderstorms, acute pollution caused by weather changes, etc. 6, sulfur dioxide 7, food and food Additives such as fish, shrimp, crab, poultry eggs, milk; cashew nuts, sesame seeds, peaches; food additives, preservatives, coloring agents and bleaching agents, etc. Medications Aspirin, aspirin compound and other non-steroidal anti-inflammatory drugs (such as APC, ketamine, quick-acting cold capsules; pain relief tablets, anti-inflammatory pain, ibuprofen, fen-phen, etc.)