Hi, my mother is a doctor so she is usually one to leave any problem signs alone. Even then, I ve had a brown spot on my lower lip for over 7 months, and she told me that if it was less than 3 months, it means nothing and I m fine. It has now been a long while and she had said it could possibly be cancerous, but even so, she knows I would dislike having to get a piece of my lip sliced off for a biopsy. In this case, I was wondering how much doctors would likely remove, and If maybe this brown spot will just go away. It s kind of noticeable now and kind of annoying. There s no pain of course, and I m honestly never in the sun, so there s a slight chance of it being cancer at all, but I m curious.