Pain down my leg

Patient: I had my left ACL repaired almost 4 years ago and recently I have been getting a horrible pain down my leg(shin area) that starts just to the right of the bottom of my scar. They used my patella tendon for the repair. I’m not sure if it is at all related, when I get this panini can’t bend my leg in the least bit with out the pain spotting down my leg

Doctor: