Chronic obstructive pulmonary emphysema is divided into two conditions: chronic bronchitis and obstructive pulmonary emphysema. Because chronic bronchitis is most commonly due to the decline in lung clearance function after the destruction of the lung structure. The most common complications are as follows: 1. Because of the decrease of lung clearance function and the destruction of lung structure, it is most likely that infection will occur after cold and flu, and after infection, fever, cough, coughing yellow pus sputum, chest tightness, shortness of breath, even hemoptysis and chest pain may occur; 2. Commonly known as pneumothorax, the patient may experience severe chest pain when lifting heavy objects or coughing violently, or when straining to defecate, or when speaking or laughing loudly, followed by dyspnea, which is also the most common pneumothorax; 3, because long-term emphysema, after chronic hypoxia, can lead to progressive decline in lung function, and then cause respiratory failure, which in turn causes cardiovascular stress The heart load increases and the heart enlarges and hypertrophies, causing respiratory failure with pulmonary heart disease and heart failure. In addition, the patient’s reduced mobility due to emphysema can lead to frequent bed rest and inactivity, which in turn can slow down vascular blood flow and cause venous embolism in the lower extremities, resulting in pulmonary vascular embolism and other important organ damage, which can lead to fatal complications and endanger life.