How can I get my lips back to normal. (photo)

When I was younger I used to pick at my lips, biting the dry skin off and never knew about lip balms around that time. As I grew older I noticed that my lips are different colors and my outer lips are darker than my inner lips. When I started smoking they begin to darken but only on my original lip skin and I'm wondering what can I do to fix it since it's hard to research with no direct name for this condition

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