A hair tattoo, scalp micro pigmentation (or SMP for short),[1] is a medical, non-surgical, cosmetic tattoo that gives the illusion of a close buzz cut hairstyle on a bald head or adds density to a thinning hair line[2] The procedure can also be used to conceal scars from hair transplantation, hide the visual impact of burns or to treat hair loss through skin conditions such as Alopecia.