Tendon and ligament injuries caused by foot sprains usually return to normal in about 3-4 weeks. A foot sprain usually causes damage to the ligaments, which tear and then elongate, causing instability of the ankle joint. If left untreated, it can cause the development of traumatic arthritis of the ankle joint. Therefore, appropriate immobilization, such as plaster immobilization and brace immobilization, must be given during the acute period after the injury, and the movement of the ankle joint should be restricted to prevent further aggravation of the local injury. Elevating the affected limb can promote the edema of the affected limb to subside and relieve the painful symptoms. In severe cases, MRI of the ankle joint should be performed to rule out any damage to the synovial membrane and articular cartilage, and to provide timely treatment and therapy.