Hi, For the last 2 weeks my lips became dark and they burn. I start applying several things cocoa butter and sometimes Vaseline. The burning had improved but yesterday when I was eating some fried fish my lips start the burning again. I have change my eating habits per doctor in the last 3 months and I stopped eating fried food but of course you have cheat days. But this is the first time this has happen to me. I just read on line some of the reasons could be lack of vitamin C and also I have been using lipstick on a daily base within the last 2 years which I never have and it said online that could be the reason. What is your suggestion, I have no health insurance and I can't afford the doctor's copay right now at the clinic.