I have a darkening of the skin about one fourth to a half of an inch around
, but only on the bottom. It is just sort of like a tanning of the skin, but only in the one sport around the bottom half of my mouth. There is no irritation of any kind from it, the only thing bad about it is that when I wash it, it gets very red, even on the chin. The people I have asked, I think jokingly have suggested Herpes, but I don't think thats it. Any suggestions on what it is.