Blonde Girl Posing With A Tattoo In The Studio

Medical tattoos are used to ensure instruments are properly located for repeated application of radiotherapy and for the areola in some forms of breast reconstruction. Tattooing has also been used to convey medical information about the wearer (e.g. blood group). Tattoos are used in skin tones to cover vitiligo, skin pigmentation disorder.
Fraternal/Social
Members of college fraternities and sororities often voluntarily elect to have their fraternity or sorority letters tattooed on their bodies.