The superficial chemical peels are very safe when used properly but can cause itching, erythema, increased skin sensitivity, epidermolysis, allergic and irritant contact dermatitis, and post-inflammatory hyperpigmentation (PIH). They are classified as superficial, medium, and deep peels. AHAs are used in treating aging skin, melasma, photoaging and acne. Alpha-hydroxy acids (AHAs) became available as superficial peeling agents in late 1980s and the 1990s. Unna described the actions of salicylic acid, resorcinol, trichloroacetic acid (TCA), and phenol on the skin.ĭuring the first half of the 20 th century, phenol and TCA were used in several centers. In 1874 in Vienna, the dermatologist Ferdinand von Hebra used the technique to treat melasma, Addison's disease, and freckles. Dermatologists began to show interest in peeling in the 19 th century. The earliest use of caustic preparations for peeling procedures was described in the Egyptian medicine in the Ebers papyrus as early as 1550 BC. Chemical peel is the most popular and common non-invasive cosmetic procedure done since the 18 th century.
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