Chemical face peeling is the application of solutions to the face to lift off various layers of the skin and remove wrinkles. Three types of chemical peels are currently available. Alpha hydroxy acid (AHA) peels are the most mild and, in lower concentrations, can he applied by nurses. Trichloracetic acid (TCA) peels are designed for peels of medium depth. Phenol peels are the oldest form of chemical peels and are used to remove deeper wrinkles. Skin care, including sun block, is important to the success of all three types of peel.