After a sports injury, cold compresses should be applied in the acute phase, and then changed to localized heat physiotherapy after the acute phase. Therefore, after the sports injury, within 24-48 hours after the injury, that is, within 1-2 days, give the sports injury cold compress treatment. Specific methods can generally use a towel wrapped in ice, applied to the injury, the purpose or benefit of doing so has two, there is pain and reduce swelling of the therapeutic effect. Because the cold compress can effectively reduce the local vasoconstriction, which can reduce the local bleeding and oozing, can reduce swelling. In addition, cold compresses can also reduce the nerve sensitivity of the endings of the injury, which can effectively reduce pain. The purpose of changing to hot compresses after the acute period is mainly because hot compresses can effectively dilate local blood vessels, thereby effectively improving blood circulation at the sports injury, which is conducive to soft tissue repair in sports injuries.