I had bunion surgery about 9 years ago. It healed fast (about 6 weeks) with no complications. In the past few days I've noticed a dime-sized slight thickening not on the surgical scar but on the side where the bunion was. There is a crescent-shaped redness lining top half of this, which looks like a scar. I have not cut or injured myself, that I recall. It just appeared. Is it something to be concerned about, or is it possibly just from wearing shoes or something? Maybe the pins are rubbing? Thanks!