Pneumothorax is caused by a rupture of the pleura, allowing air to enter the pleural cavity, and it is relatively common clinically. Can pneumothorax be cured after it occurs? It depends on the specific circumstances. If it is a closed pneumothorax with a small amount of air accumulation, conservative treatments like rest and oxygen therapy can allow for self-healing of the pneumothorax. However, in most cases, the accumulation of air is generally significant, and often it is a tension pneumothorax. In these instances, treatments generally involve pleural cavity puncture, or closed pleural drainage to drain the air, making it difficult to heal spontaneously and requiring medical treatment. Moreover, some patients may not recover fully despite aggressive treatment and may require surgical intervention.