Deep breathing chest pain can be caused by a variety of reasons, such as pleurisy, pneumothorax, costochondritis, and so on. The specific cause needs to be determined after a thorough examination in the hospital and treated according to the cause. The specific causes are as follows: 1. Pleurisy: Suffering from pleurisy can be manifested as chest pain, which can be unspecified discomfort or severe stabbing pain, or only occur when the patient takes a deep breath or coughs. Treatment is usually based on the severity of the disease, such as antibiotics or thoracentesis to extract fluids. 2. Pneumothorax: The chest pain of pneumothorax is mostly pinprick or knife-like, which may be accompanied by irritating cough, and is usually aggravated by deep breathing. Treatment is also based on the severity of the choice, generally there are exhaust therapy, surgical treatment and in the routine chest closed drainage based on the use of bronchoscopic balloon exploration and selective bronchial occlusion, blocking the bronchial tubes leading to the broken lung to achieve the purpose of treatment. 3. Costochondritis: Costochondritis can lead to chest pain with deep breathing, which is aggravated by deep breathing, coughing and exercise. Treatment is usually a combination of antibiotics and analgesics. So after the symptoms of chest pain with deep breathing, you must consult a doctor in time to find out the cause of the disease before you can do effective treatment.