Coughing for a long time is not good, and the more common diseases are chronic bronchitis, bronchiectasis, chronic obstructive pulmonary disease, or asthma. The first step is to go to the hospital for a chest CT examination, which can rule out chronic bronchitis and bronchiectasis. These two diseases generally require anti-inflammatory treatment by infusion, and the commonly used antibiotics belong to the cephalosporin class. In addition, in the hospital to do bronchial diastolic test and bronchial excitation test to see if there is the possibility of asthma and cough variant asthma. If these two diseases are present, long-term treatment with nebulized drugs is required. Bronchodilators and glucocorticoids are usually chosen for long-term prevention and treatment.