I had the same operation 4 years ago and my sternum still hurts. I have tryed exersise and that makes it worse, mine did click for 4 months after surgury and was told that the pain would go away in a year. I have seen several Dr. but like you they have no idea why or what to do about it. I have come to realise that the pain is the price I pay to live and accept the fact that it will not go away. Sometimes it just hurts other times it burns like it is on fire or there is like being stuck with a needles. Wish you the best but you may be out of luck on finding a fix.View Thread