After ankle sprain, cold compress treatment should be applied within three days, while it can be changed to hot compress treatment after three days as follows: 1, after ankle sprain, local vascular exudation increases, the tension in the soft tissues will gradually increase, and the patient will have symptoms of swelling and pain, and at this time the use of cold compress treatment can inhibit vasodilatation, reduce swelling, and alleviate the pain. 2, after three days, the symptoms of swelling and pain are more stable, and it can be changed to Hot compress treatment can accelerate blood circulation and promote further repair of the injury. Whether to apply cold compresses or hot compresses after ankle sprains mainly depends on the time of the injury. In the short term, cold compresses are beneficial, while in the long term, hot compresses are good for later recovery. Therefore, choosing between cold and hot compresses after an ankle sprain over time is extremely beneficial to the patient’s recovery.