Ankle sprains (wrenched ankle) usually cause tearing of muscle ligaments and other soft tissues around the ankle joint, capillary bleeding and exudation of tissue fluid, but if the external force applied is too great or the bone quality is not good, it can cause fracture. The ankle joint is the largest and most important weight-bearing joint in the human body, its basic activity direction is dorsal extension and plantarflexion, the ankle joint not only requires stability, but also requires flexibility. Therefore, injuries to the ankle joint are common during strenuous exercise. In general, sprains of the ankle joint often appear ligament tears, there will be subcutaneous bruising, localized pressure and pain and other symptoms, at this time the injury is the ligaments around the ankle joint, and generally will occur in different degrees of tearing. However, if the external force is too large or the passive movement of the joint is too large, it may cause the fracture of the ankle joint, and the common type of fracture is the avulsion fracture of the tip of the outer ankle. Besides, it may also cause fractures in other parts of the ankle joint, and even open fractures in severe cases. Conservative treatment can be used for fractures with little displacement, but for fractures with large displacement, more complicated conditions or damage to nerves or blood vessels, timely surgical treatment is needed.