<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have a painless hard lump on the bone running down the front of my leg. It is about 312 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.  <response>: Hi! Good evening. I am Chat Doctor answering your query. As it needs a clinical assessment of the lump to comment on it specially with a history of this kind of weight loss you wrote, I would advise you to consult a general surgeonorthopedic surgeon in your area, who might investigate you radiologically before opining on the same. Thanks for choosing Chat Doctor to clear doubts on your health problems. I wish you an early recovery. Chat Doctor. 