Pulmonary alveoli in the lower lobes of both lungs indicate that the destruction of lung tissue in both lower lungs is very serious. The lungs are normally made up of alveoli, and in cases of lesions such as chronic obstructive pulmonary disease, the resulting airflow obstruction can cause alveoli to be destroyed to form emphysema. When emphysema is more severe, for example, the area of alveolar destruction continues to expand, and on imaging if there are more than 1 cm of vacuoles. This is called pulmonary maculopathy. However, the risk is greater in the formation of pulmonary blisters in both lower lungs than in the upper lungs because the thoracic ribs around the lower lungs are much more mobile than in the upper lungs, and there are also septal muscles underneath the lower lungs, and the septal muscles are more mobile, and the lung lobes expand more when these are active, so pulmonary blisters are more likely to break down in the lower lungs and cause pneumothorax. Therefore, it is very necessary to stop the further development of pneumothorax by actively quitting smoking, actively doing treatment, and even helping the lungs to regain elasticity if pneumothorax is found in the lower lung.