Ankle sprains are very common, with about 100,000 people across the country spraining their ankles every day, with basketball, soccer, and badminton being the most common. One of the most common is the lateral collateral ligament injury of the ankle, including the anterior talofibular ligament, the Achilles fibular ligament and the posterior talofibular ligament injury. Most patients, who have no fracture after ankle sprain, neglect the treatment of lateral collateral ligament injury of the ankle, resulting in repeated ankle sprains and joint instability. Main manifestations: Lateral ankle pain, most noticeable when walking and moving the joint. In severe cases, the bruising on the lateral side is obvious, some to the front of the outside of the foot. Repeated ankle sprains and joint instability are felt. Lateral pressure points on examination. A positive drawer test considers the lateral collateral ligament to be a complete rupture. Radiographs can reveal a possible avulsion fracture of the lateral ankle tip with or without small fracture fragments. An MRI can identify the torn ligament. TREATMENT: 1. Fresh, mild to moderate, injuries should be promptly iced and compression bandaged. Non-surgical treatment can be used, with cast immobilization for 2-4 weeks followed by replacement of the walking cast. 2, the joint exists ankle obvious instability, then need surgical treatment. The broken end is sutured or ligament stop reconstruction is performed. After 3 weeks of postoperative cast immobilization, rehabilitation training for joint mobility, muscle strength, and proprioception is initiated.