Pneumothorax pain is a sudden chest pain caused by gas entering the pleural cavity and stimulating the mural pleural nociceptive nerve endings, which is a pinprick or slashing pain and usually lasts for a relatively short period of time. Pneumothorax can be divided into traumatic pneumothorax and spontaneous pneumothorax. 1. Traumatic pneumothorax: trauma to the chest wall or lungs is called traumatic pneumothorax. Traumatic pneumothorax can be divided into open pneumothorax, closed pneumothorax and tension pneumothorax. Open pneumothorax and tension pneumothorax need to be treated urgently. Principles of treatment: tension pneumothorax should be punctured and decompressed first, and open pneumothorax should be turned into closed pneumothorax first. 2. Spontaneous pneumothorax: caused by the disease to the lung tissue rupture caused by its own is called spontaneous pneumothorax, most common in male young adults or suffer from chronic obstructive pulmonary disease, tuberculosis of the elderly patients, spontaneous pneumothorax is one of the respiratory medicine emergency, often damage to the lung function, if not dealt with in a timely manner often affects the work and daily life. Patients with pneumothorax pain are advised to go to the hospital in time for further clarification of the cause and treatment.