Someone running a really hard object into the leg I've had surgery on twice
Dreams can have many different interpretations and meanings depending on the context of the dream and the person's personal experiences and emotions. However, based on the details given, this dream may be an unconscious reflection of any physical pain or discomfort you may be experiencing in your leg that has previously undergone surgery. Alternatively, the dream may symbolize some form of inner conflict or emotional trauma that you may be experiencing, which is being manifested in the physical form of a painful leg.
It's important to take note of any emotions you may have felt during the dream or upon waking up, as well as any particular events or situations that may have led up to the dream. Consulting a therapist or physician could also provide additional insight into the possible meaning of this dream.