Reasons for recurrent cough attacks: 1. misinterpretation of allergic airway inflammation as bacterial inflammation and misuse of antibiotics; 2. misdiagnosis and mistreatment of cough variant asthma as “bronchitis”; 3. misinterpretation of chronic asthma caused by cardiac insufficiency as bronchial asthma; 4. lack of attention to the education and 4. not paying attention to the education and psychological guidance of asthma patients and their families; 5. not paying attention to the application of pocket-sized peak velocity meter to monitor the asthma condition and clinical. Why do repeated asthma attacks cause emphysema? During bronchial asthma attacks, bronchial smooth muscle spasm, mucosal edema and increased secretion lead to incomplete obstruction of bronchial formation. However, there is no pathological damage to alveolar elastic fibers and bronchial smooth muscle. At this time, if the bronchospasm can be relieved, the gas in the lung can be expelled and the patient can recover completely, therefore, bronchial asthma is reversible. If long-term recurrent attacks occur, it will lead to: ① proliferative hypertrophy of bronchial and fine bronchial smooth muscle, and formation of organic narrowing of fine bronchial; ② hyperplasia and hypertrophy of bronchial glands, which secrete a lot of mucous material and block fine bronchial; ③ destruction of cartilage of fine bronchial wall and loss of normal scaffolding effect, so that when inhaling, bronchial expansion, gas can still enter alveoli; but when exhaling, bronchial closure, gas cannot be expelled, so that ④ Long-term gas accumulation, alveolar pressure rises, alveoli over-expand, elasticity decreases, and finally rupture, forming emphysema.