The lateral bulge of the ankle can be treated by the following methods: 1. If it is a local mass caused by local bursal inflammation, there will be obvious pain when pressing, and the local temperature will rise, which can be confirmed by ultrasound examination. If the symptoms are obvious, surgery is needed to remove it.2. A hard bag bulging on the outside of the ankle needs to be X-rayed to confirm whether there is an external ankle fracture. If there is a displaced fracture, external fixation by manual repositioning or internal fixation by incision repositioning is needed to restore the stability of the fracture end before the local mass can be removed and the function of the ankle joint can be restored. The patient should be diagnosed and treated in time to solve the problem, otherwise the local mass will persist without disappearing and affect the normal function.