Pulmonary alveoli can be divided into congenital pulmonary alveoli and acquired pulmonary alveoli. 1, congenital pulmonary alveoli: It is caused by abnormal bronchial development, abnormal development of mucosal folds in the form of membranes, and poor cartilage development during infancy, which causes the action of live valves. 2.Acquired pulmonary maculoplasm: It is produced by the interaction of multiple factors. Common factors include infectious factors, environmental factors and some unexplained factors. Infection factors: pediatric pulmonary blister is mostly caused by Staphylococcus aureus infection, adult pulmonary blister is usually secondary to inflammation of the bronchi, such as pneumonia, tuberculosis, bronchial dilatation, etc. These inflammatory diseases damage the lung tissue, the alveolar wall and interval gradually disappear, but also make the pressure of the alveoli rise and rupture, forming pulmonary blister. Environmental factors: such as smoking for a long time to inhale dust or harmful gases, due to high alveolar cavity pressure, will be more likely to develop. There are also many unexplained factors. The treatment of pulmonary alveoli differs for different causes. In particular, infective pulmonary maculoplasm is treated with aggressive antibiotics. For tuberculous pulmonary blister, treatment such as anti-tuberculosis should be given. For long-term smokers, active cessation of smoking is required. For those who inhale dust, get out of the dust environment in time. Only by treating the cause can we better relieve the symptoms of pulmonary herpes and allow patients to improve their quality of life.