However, if left untreated, the ligament will lose its role in maintaining the stability of the joint, leading to joint instability, cartilage degeneration and osteophytes, resulting in a gradual decline in ankle function and the formation of local adhesions, leading to the loss of normal flexion and extension of the ankle joint. Usually, the anastomosis of the ruptured ligament is performed surgically, and then external fixation of the cast is performed. After about 3-4 weeks of fixation, the cast can be removed for functional exercises of forward flexion, back extension, adduction and abduction of the ankle joint, and the strength, time and range of the exercises should be increased gradually. Otherwise, it will cause the injury location to be stretched again, resulting in slow healing.