I developed this purple mark on my boob and now it’s developing an almost white looking head. I went to work a few days ago with nothing and after my 12 hour shift it just appeared and was purple. I think I remember a black head a few weeks ago near this spot that I popped. Could this be an infection resulting from that? It’s not really painful, not warm to the touch, not raised, it just looks really bad and I’m not sure if I should get it looked at? I’ve really just left it alone aside from the usual scratching or when I wash my body with a loofa. Should I be seriously concerned? Im about to go out of town for Christmas and don’t want to be worried the whole time.