There are many ligaments around the ankle joint. If you have an ankle sprain, you should immediately consider applying ice, not walking on the ground, and then go to the hospital for a radiograph to see if there is a fracture. If there is no fracture, the most principle treatment is to fix the ligament in a cast for 3 weeks to allow the ligament to heal slowly under fixation. During this process, do not walk on the ground and elevate the leg at night while sleeping. After 48 hours, you can consider doing hot compresses and topical application of Yunnan Baiyao aerosol to relieve pain. If a fracture occurs, depending on the results of the radiograph, the lighter one can be protected by external fixation in plaster for a month to a month and a half, while a serious fracture dislocation can be considered for surgery to correct the problem.