Estheticians are usually trained in different areas. An esthetician usually specializes in beauty and cosmetics. She has to work with skin, hair, teeth, face, nails and they are able to focus more on a particular area of beauty and they know how to make it work for the client.
Aesthetics and social skills are important aspects to keep in mind in order to achieve a successful client relationship. All an esthetician has to do is get to know the clients well.