Dermatology is a branch of the medical profession, practiced by licensed physicians, who specialize in disorders of the skin. Esthetic practice specifically excludes diagnosis, prescription, or any other service, procedure, or therapy that requires a medical license. If you’re being treated by a dermatologist, your esthetician can provide complementary and support therapies. In addition, estheticians are trained to recognize early signs of many medical conditions affecting the skin and will refer you to a dermatologist in such a case. Cosmetology is the study of beauty treatments including nail care, hair care and styling, makeup application, skin care and more. Esthetics is one branch of cosmetology; some estheticians work in other branches of cosmetology in addition to their skin care practice.