A short-term cough has less impact on the lungs, but a longer-term, severe cough has a greater impact on the lungs. If a respiratory infection occurs, the cough is triggered, if it is not treated in time, the sputum is not discharged, which can easily lead to sputum clogging, resulting in the phenomenon of lung solid changes, which has a greater impact on lung function. In addition, if a lung tumor occurs, triggered by the cough, the impact on the lungs is even greater, if not timely surgical treatment, the phenomenon of death will soon occur. If the cough caused by bronchial dilatation, the impact on lung function is also relatively large, the dilated bronchial tubes are prone to pulling the surrounding small blood vessels, rupture and bleeding phenomenon, easily accompanied by coughing up sputum and hemoptysis phenomenon, very dangerous. In addition, if the cough caused by tuberculosis, the impact on lung function is also relatively large, tuberculosis bacillus for lung tissue invasion ability is particularly strong, the impact on lung function is also particularly serious.