Bruising of the nail cap after being caught in a car door, the pain usually lasts for about 3 days before it subsides. If the pain is severe, it is necessary to check whether there is a fracture, and at the same time, it is feasible to take medication to relieve the pain. Bruising of the nail cap after being caught in a car door, the pain mainly exists in the acute stage, usually for 3 days, but some pain lasts longer. After the injury, it is recommended to go to the hospital to check whether there is a combination of fracture and other conditions, if there is no open wound and fracture, then it is an acute closed soft tissue injury, and can be analgesic through cold compresses, drugs and other measures. Analgesic drugs are the cornerstone of the treatment of acute closed soft tissue injury pain, and can be used externally with non-steroidal anti-inflammatory drugs such as flurbiprofen gel paste or oral analgesic drugs such as acetaminophen. The above drugs need to be used under the guidance of a clinician, and unauthorized use of drugs is prohibited; the appearance of bruising after the nail cap is caught in the car door, it is recommended to go to the hospital in time to avoid delaying the condition.