Pulmonary air bubbles, also known as emphysema, can cause a series of symptoms in these patients, mainly manifesting as symptoms of respiratory impairment, such as wheezing, shortness of breath, shortness of breath, and even accompanied by chest tightness, palpitations, and chest pain. If the extent of lung bubbles is relatively large, the lung function will drop sharply at this time, and extreme respiratory distress or even respiratory failure may occur. Patients appear weak, depressed, drowsy and comatose, especially after exercise, and the symptoms are more obvious. If accompanied by bacterial infection, there may be a large amount of coughing and coughing of pus sputum, even accompanied by a tendency of gradually increasing body temperature.