After the sprain, you need to wait until 48-72 hours after the injury before you can apply local heat. At that time, the main purpose of hot compresses is to promote local blood circulation, promote the absorption of local blood, so as to effectively improve the patient’s local swelling and pain symptoms, and promote the rapid repair of sprains. Just after the injury, the patient needs to actively apply cold compresses, the main purpose of cold compresses is to constrict blood vessels, reduce bleeding, reduce swelling. In addition to cold compresses and hot compresses, the injury requires local protection and braking, never premature exercise, otherwise it will aggravate the injury and is not conducive to injury repair. Patients with severe swelling of the limb should also elevate the affected limb above the heart, which is more conducive to promoting venous return and facilitating swelling. Pain medication should be used, and if the pain is severe in the later stages, a local plain x-ray should be performed to determine if there is a fracture.