After the leg is swollen, hot and cold compresses can be applied, just in different time periods, different programs are taken. Within 24-48 hours after the injury, cold compresses are considered to help reduce swelling and pain. After this time, hot compresses can be applied to promote the swelling to subside, which is the whole principle. If the fall swelling is not only soft tissue injury, but also serious fracture, ligament and muscle strain injury, you should go to the hospital for corresponding examination in time. In addition to soft tissue injury, the specific characteristics of the injury, and then choose the appropriate treatment plan, because at this time, whether it is cold compresses, or hot compresses, for the treatment of injury does not appear to be very critical, but only a very simple auxiliary treatment.