Ankle enlargement after spraining the foot may be caused by edema, hematoma or ankle fracture due to local soft tissue injury, which can be treated with cold compresses, physical therapy, external fixation, etc. Surgery can also be performed. 1. When local soft tissue injury causes edema or hematoma, cold compresses should be applied immediately to reduce local bleeding and swelling. 72 hours later, local physical therapy or hot compresses can be applied to promote the swelling to subside and promote healing. If combined with ligament injury, external immobilization such as plaster, bandage or surgery is also needed. 2. When ankle fracture occurs (usually diagnosed with the assistance of X-ray and CT), according to the conventional principle, manipulation should be carried out first for external fixation, and if it is unsuccessful, incision and internal fixation should be used. If sprained foot occurs, need to go to the hospital as soon as possible, by the doctor according to the specific conditions, to formulate individualized diagnosis and treatment plan, so as not to delay the condition.