<s>[INST] I fractured my clavicle approx 1.5 years ago and had it surgically repaired with a metal piece.  It has been relatively pain free up until the last several months.  Now it is very painful and the bone from the ventral line is very enlarged and looks like a large lump to about mid shoulder. [/INST] Hi, dairy have gone through your question. I can understand your concern.  You may have some complication of fracture.  You should go for x-ray of local part.  It will give you exact diagnosis whether you have bony overgrowth or MAL union or some other cause.  Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. </s>