The ankle is a common place for an avulsion fracture.
An avulsion fracture occurs when an injury causes a ligament or tendon to tear off (avulse) a small piece of a bone to which it's attached. The injury may be due to direct trauma, such as a hard tackle in football, or indirect trauma, such as an aggressive pivot in soccer or basketball. This type of fracture can also be associated with
serious injury to the involved ligament or tendon.
Small avulsion fractures don't need surgery or casting. Treatment typically is with ice and rest. Small avulsions rarely cause any problems after the injury heals. The avulsion may still be visible on an X-ray. But it usually doesn't cause any pain or discomfort