Thank you.. :) I had acne years ago,including on my chest. This was about 17 years or so ago. Much of the acne,almost all,has gone. But in the center of my chest is now a sore, where I think I may have scratched at an acne thing. Its pretty noticeable, not too far from bottom of neck. Have you heard of this before,and do you think there may be anything I can do to remove the sore looking mark?