How to remove dark spots on my lips?

How to remove dark spots on my lips?

I wont smoke and drink...

I am a man with normal white color but lips are black

pls solve my problem

You can put a toothpaste with neem on your lips before you go to bed. Here are some other tips:
http://www.desibeautytips.com/lip-care/dark-lips/how-to-lighten-dark-lips.html