I had open heart surgery about a year and a half ago and i was left with a keloid scar. I have since had two sets of steroid injections to try and flatten the scar. This has worked but I have discovered that now that the skin has flattened there are a few lumpy areas along the length of my sternum where the bone has healed together, and this is quite visible. Does anyone know of any surgical / non-surgical procedures i could try to make this better?