Can anything be done for raised hypopigmented chin scar from trauma? (photos)

When I was young I slipped and fell on my chin resulting in one big visible white scar on my chin and two small ones. Seven years later I really want to get something done to minimize their appearance. The texture of the skin beneath is kinda hard and it feels like the area is slightly raised. I also think that as a result of the trauma the surrounding skin changed texture to become more bumpy and depressed in some areas. Can something also be done about the lack of hair growth in the scars?

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