Aestheticians are licensed professionals who are experts in maintaining and improving skin. An aesthetician's general scope of practice is limited to the outer layer of skin.

Aestheticians work in many different environments such as salons, medi-spas, day spas, skin care clinics, and private practices. Aestheticians may also specialize in treatments such as microdermabrasion, cosmetic electrotherapy treatments, LED (light-emitting diode) treatments, ultrasound/ultrasonic (low level), and mechanical massage.

An aesthetician may undergo special training for treatments such as laser hair removal, permanent makeup application, light chemical peels, eyelash extensions, and electrology.

In the US, aestheticians must be licensed in the state in which they are working and are governed by the cosmetology board requirements of that state. Aestheticians must complete a minimum 260–1500 hours of training and pass both a written and hands-on exam in order to be licensed.

Utah, Virginia and Washington are the only states at this time to adopt the Master Esthetician License. Additional post graduate training is sometimes required when specializing in areas such as medical esthetics (working in a doctor's office).

Aestheticians work under a dermatologist’s supervision only when employed by the dermatologist's practice. Aestheticians treat a wide variety of skin issues that are cosmetic in nature, such as mild acne, hyperpigmentation, and aging skin.

More Info: en.wikipedia.org