A chemical peel is a process done by a cosmetologist to improve the appearance of the skin on the face, neck or hands. A chemical skin peel involves the application of a solution to the entire face or to specific areas to peel away the skin's top layers. Several light-medium depth peels can often achieve similar results to one deeper peel treatment, with less risk and shorter recovery time. The gentlest peels use alpha-hydroxy, glycolic, and lactic or fruit acids that are gentle. A full-face deep chemical peel takes 1 to 2 hours to perform. A more limited procedure (such as treatment of wrinkling above the lip) will generally take less than a half-hour. The new layer of skin begins to appear seven to ten days after treatment, though complete healing can take two months or longer. The procedure can restore a more youthful appearance to skin and reduce wrinkles, uneven pigmentation, sun-damage, and blotchy patches. The new, regenerated skin is usually smoother and less wrinkled than the old skin. Some patients experience discomfort after a deep chemical peel, but this can be controlled with medication. A few days after the procedure, new skin with a bright pink color akin to sunburn will emerge, the pinkness will fade within a few days. Post-operative puffiness will also subside in a few days, but the skin will remain sensitive. Patients should avoid exposure to sunlight and continue to use sun block.