The hip pain may be delayed after a car accident because it takes time for the symptoms of an injury to develop. In some cases, the adrenaline and other chemicals released by the body in response to the accident can mask the pain of an injury for a short time. In addition, the swelling and inflammation that often accompany an injury can take time to develop, which can delay the onset of pain. It is important to see a doctor as soon as possible after a car accident to evaluate for any potential injuries, even if you do not have any pain at the time of the accident. This can help to ensure that any injuries are diagnosed and treated promptly, which can improve your chances of making a full recovery.