Lighten hyper pigmentation around mouth. (photo)

I've had darkness around my mouth since I was a child. I would lick my lips repeatedly and it formed a dark ring around my lips that would seem to go away. It is a shade that is quiet dark compared to the skin on my cheeks forehead and nose etc. Is there a way to lighten the hyper pigmentation or will it remain forever? I don't have money for any procedures I'm stil quiet young and don't want to bleach my skin. I also have very sensitive skin.

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