CosmetologistsCosmetologists practice hair-care skills (including washing, cutting, coloring, perming, and applying various conditioning treatments), esthetics (performing skin care treatments), and nail care (grooming of hands and feet). Barbers are not cosmetologists; they undergo separate training and licensing procedures. There are approximately 683,800 cosmetologists, hairdressers, and hair stylists employed in the United States. Cosmetologists are also known as beauticians and hair stylists.