Natural fruit acids are applied to the skin which remove damaged cells, resurfacing the skin.
Superficial peels use glycolic acid, salicylic acid, and Jessner solution and are well tolerated — the ‘lunchtime’ peel. They remove thin lesions on the skin surface, reducing pigment and surface dryness. The result of the first peel may be disappointing, but after repeated peels, significant improvement is usually evident. A nurse or aesthetician (beauty therapist) may perform superficial peels.
Trichloracetic acid (TCA) is the most common chemical used for a medium depth peel. The results depend on its concentration, usually 20–35%. The treatment is painful and treated areas are swollen, red, and crusted for the next week or so. It can lead to an impressive improvement in skin texture with a reduction in blotchy pigmentation, freckling, and actinic keratosis (dry sunspots). Although fine wrinkles and some acne scars are less obvious, the TCA peel has no effect on deep furrows. A dermatologist or plastic surgeon usually performs moderate to deeper peels.
Phenol results in deep skin injury. It is rarely used for facial peels nowadays because of the risk of scarring and because of its toxicity. Absorption of phenol through the skin results in potentially fatal heart rhythm disturbances and nerve damage. However, it is very effective at improving both surface wrinkles and deep furrows. After a phenol peel, the treated skin is pale and smooth but it may be waxy and ‘mask-like’.