COPD, also known as chronic obstructive pulmonary disease, clinically includes three types. 1. chronic respiratory failure, mainly seen in the disease can lead to a decrease in the ability of the lungs to carry out blood oxygen exchange, patients will suffer from hypoxia, carbon dioxide retention and so on. Patients need to improve their symptoms with the help of low-flow oxygen and appropriate application of respiratory stimulants. 2. chronic pulmonary heart disease, which is a disease caused by chronic obstructive pulmonary disease, including vascular remodeling, pulmonary hypertension and induced heart failure can occur. 3. spontaneous pneumothorax, which is mainly seen in COPD, and excessive rupture of the alveoli can lead to pneumothorax resulting in weakened breath sounds and severe chest pain. In severe cases, the lungs will be compressed and atelectasis will occur, requiring urgent symptomatic treatment with surgical exhaustion.