Emphysema is only a pathologic change, not a specific disease name, and cannot determine severity or predict clinical prognosis. In patients with emphysema, it is recommended that pulmonary function be evaluated to determine the severity and, if necessary, medication. 1. Emphysema is a pathologic change that can often be detected by chest CT. For patients with consolidated emphysema, it is recommended to complete pulmonary function tests to screen for significant ventilatory dysfunction. 2. According to the severity of lung function, there are five levels: mild, moderate, moderately severe, severe and very severe. When the presence of emphysema is detected, timely smoking cessation and avoidance of exposure to hazardous dust are recommended. According to the results of lung function, inhaled bronchodilators, such as budesonide formoterol for inhalation, tiotropium bromide for inhalation, and more than one in combination are required for severe cases, should be used under the guidance of a doctor as appropriate. When the problem of emphysema is detected, timely medical treatment and regular review and follow-up should be carried out.