The principle of pneumothorax balloon blowing is to make the lungs reexpand by blowing the balloon, when blowing the balloon with force, tension appears in the lungs, which is conducive to the expansion of the lungs. After the treatment of pneumothorax patients, blowing the balloon can increase the resistance to expiration, maintain a certain tension in the bronchial tubes, promote the full expansion of the lungs, so that the lungs compressed by pneumothorax can be reexpanded as early as possible, avoiding substantial diseases such as pulmonary fibrosis caused by long-term lung compression. In addition, it can also promote better expulsion of gas and residual fluid from the thoracic cavity after surgery and prevent the formation of pneumothorax. Pneumothorax is the entry of gas into the pleural cavity, resulting in a pneumothorax and compression of the lung tissue. A pneumothorax is usually caused by underlying lung disease or the effects of external forces that cause emphysema bubbles near the surface of the lungs to rupture, which can cause gas from the lungs and bronchi to escape into the pleural cavity. Patients with pneumothorax should be instructed by their doctor to blow the balloon correctly by taking a deep breath, blowing slowly into the mouth of the balloon, and trying to blow the balloon as large as possible until it won’t budge.