Hm, I've actually never heard of this.

<edit> I googled it and found some answers

First they're saying to cut back on smoking, drinking tea or coffee, then apply vasaline, ghee, olive oil, or lemon juice to them to moisturize and lighten 'em. It says it'll take about a month to see a difference..

(http://www.indiaparenting.com/faqs/b...ark_lips.shtml)
BabyFacedAbortion Reviewed by BabyFacedAbortion on . How Can You Stop Your Lips From Getting Dark If you Smoke? What's up ? I'm 24 male and about to get head shots taken and my lips are darker. It doesn't look bad you would'nt know I smoke if I didn't mention it, but I was looking at some pic's of myself from about 2or3 years ago and my lips were pinker. I don't want them to get darker then this so I was wondering is there something I can use to make them lighter or stop them from getting darker. If not I'm willing to stop smoking only if my lips will improve if not then I don't know what to do. Rating: 5