Bronchial asthma is a chronic reactive airway inflammation caused by various cytokines. There will be wheezing, dyspnea, chest tightness and shortness of breath. Mainly in the evening and early morning. The main cause of bronchial asthma attack is inhalation of mutagens, such as dust mites, dust, flour, pollen and so on. Air pollution, smoking, respiratory inflammation and infection can all be induced. At present, the treatment measures should first remove the induced mutagens, and desensitization therapy can be used. Drug selection. Anti-inflammatory drugs, such as glucocorticoids, bronchodilators and β2 receptor blockers, such as salbutamol or terbutaline, aminophylline, etc.