Traumatic chest injuries are commonly seen in traffic accidents, fall injuries, puncture wounds, etc. Chest injuries often manifest as severe respiratory distress, general bruising, unconsciousness, and even shock. First aid for traumatic pneumothorax is as follows: 1. Check the patient’s injury first to assess whether the scene environment is safe, and if there is a danger that needs to be eliminated in time. 2. After calling the emergency number to confirm the safety of the scene environment, you should first call the injured person to determine whether the injured person is conscious and whether there is any breathing difficulty, bruising of the lips and other manifestations. Then observe the wound situation, check the wound size, depth, whether there is gas with breathing from the wound in and out. At the same time promptly call the emergency number. 3, dressing treatment wound before the arrival of emergency vehicles, dressing the wound. Take sterile gauze to cover the wound, use an impermeable plastic bag, cover the sterile gauze, and use wide tape to stick the three edges of the plastic bag on the skin, keeping the bottom edge unpasted, so that the gas can be discharged and not easily enter the chest cavity. 4.Placement of comfortable position After dressing the wound, assist the patient to take a comfortable position: you can let the patient take the affected side, and put a pillow on his back.