Hi.. Am 24 yr old female from south Tamilnadu. I have this dark lip problem for the past 4 or 5 years. I have consulted a dermatologist and she said it's my natural lip color and I also tried to ignore this problem. But recently I see my lips getting darker day after day and it worries me a lot. Am looking for some kind of treatment for this, if not a complete remedy I would like to have atleast the lightening of my lip color. Please could some help me in this issue.