question: I have a painless hard lump on the bone running down the front of my leg.  It is about 31/2 inches up from my ankle.  It is clearly visible, does not move, does not cause pain in the leg, & there is no color change.  I probably noticed it about five months ago.  I should also say that I have lost about 130 pounds over the past two years, & that I sometimes get Charlie Horses in my calves.