Hi i have a bad habbit of chewing my lips specially when im reading or doing some work with focus. because of this habit i got white patches on my lips (the places where i chew) now which is quite visible also i get dry flaky layer of skin there which triggers me even more to chew it. I'm trying my best to avoid this habit also got dental checkup done and my teeth is properly aligned. just wanted to know if this is treatable and how to get rid of this pigmentation. also my lips are quite dark in color even though i do not smoke or drink ehat can be the reason ?