Chest injury after a few days has been pain may be fracture, trachea, bronchial injury, etc., you can carry out chest compression fixation for reset, pay attention to the prevention of infection, coughing and other factors that lead to pain aggravation, you should consult a doctor to find out the cause of the disease in a timely manner. 1. Chest injuries may lead to rib fractures, which can cause pain and, in severe cases, may aggravate secondary injuries to the tissues around the chest. A prompt trip to the hospital for an X-ray/CT should be made to identify the cause. Chest compression immobilization and surgery if necessary may be performed. 2. Severe chest pain can take painkillers such as ibuprofen extended-release capsules, and attention should be paid to the prevention of infection to prevent coughing from aggravating the pain or causing secondary injury to the surrounding tissues. 3. If accompanied by coughing, hemoptysis, etc., may be trachea, bronchial injury, pay attention to keep the airway open, to avoid the emergence of respiratory distress life-threatening. Medications should be used under the guidance of a doctor and go to the hospital in a timely manner.