Bump has formed just under my knee where tibia fracture is theirs no pain and it has no movement it's hard also like bone wondering what it could be

I broke my knee cap and had it wired together until it healed. After the surgery to remove the wire, everything was doing pretty good until a few months later. At this point, I developed a "bone spur". I did go back to the doctor to have it x-rayed and as it turned out, it wasn't a big deal. He did say it was good that I came back though because it could have been a problem.

I suggest you return to the doctor and have it checked. It could be nothing but what if it's not? Do you want to take that chance?