Sir/mam i have a scar on my upper lip how can i grow hair on it?

Scar hairs: Scars normally do not grow hair as they lack normal skin surface with hair follicles. You should see a plastic surgeon who can possibly perform a skin transplant from a hairy part of your body. Good luck

Moustache/beard: In general, scar tissue does not exhibit hair growth.In a male, Unless the scar is extremely unsightly or a plastic surgeon recommends reparative surgery, it is best not treated aggressively. A consulting .Dermatologist might suggest dermabrasion. Ultimately, the simplest solution may be some form of moustache/beard, as seen in Stacey Keach and Joaquin Phoenix..