After a lung puncture procedure, it is generally considered to pass the danger period after 4-5 hours. The main complications of lung puncture are pneumothorax and intrapulmonary hemorrhage, with pneumothorax being the most common. Pneumothorax is prone to occur mainly due to poor puncture positioning or the presence of diseases such as chronic obstructive pulmonary disease, pulmonary macrosomia, or pulmonary fibrosis in patients, resulting in poor underlying lung conditions. However, most patients who develop a pneumothorax have only a small amount of pneumothorax, which requires no special treatment and can usually be absorbed on its own. If a medium or large amount of pneumothorax occurs, the patient will feel chest tightness and breathlessness, which can be resolved by puncture and suction or closed chest drainage, etc. If a pneumothorax occurs, the above-mentioned symptoms usually appear quickly, so the patient is usually considered to have passed the dangerous period after resting for 4-5 hours without significant discomfort. Although there are certain complications of lung puncture, they are less likely to occur under the operation of professional doctors in regular hospitals, and even if unfortunately complications occur, corresponding treatment measures can be taken in time without excessive worry.