It has been 6 years now since i have been facing this problem with my lips.i remember i used to bite my lips and peel the skin of my upper lip with nails.after some time i noticed that upper lip got discoloured like when i laugh i notice a pattern of dark lines on my upper lips.dark line followed by a my natural lip colour and then a dark line.as a whole they look very ugly.i am facing this problem since this day please help!