Pulmonary emphysema is one of the common respiratory diseases. If pulmonary apical limited emphysema appears and the patient has no obvious cough, chest tightness or shortness of breath, it can be temporarily left untreated. However, the following points need to be noted: First, quit smoking as early as possible to avoid inhaling harmful gases and particles. Second, exercise properly to enhance personal fitness and prevent cold and flu in general. Third, the patient should avoid violent coughing and keep the bowels open to avoid pneumothorax after the rupture of emphysema caused by the above factors. Fourth, continuous low-flow oxygen can be administered at home to improve the condition of the lungs.