A chemical peel is a technique used to improve the appearance of skin on the face, neck or hands. A chemical solution is applied to the skin that causes it to exfoliate and eventually peel off. The new, regenerated skin is usually smoother and less wrinkled than the old skin. There are three basic types of chemical peels including superficial peels, medium peels and deep peels. A thorough evaluation is important prior to receiving a chemical peel.