A TCA (trichloroacetic acid) peel is a type of chemical peel used to improve the appearance and texture of the skin. TCA peels work by removing the outermost layers of damaged skin. They are commonly used to treat a variety of skin concerns, including fine lines, wrinkles, acne scars, sun damage, and uneven pigmentation. TCA peels come in different strengths or concentrations of the acid, ranging from superficial to deep, and can be tailored to suit individual skin types and concerns. Stronger formulas create a deep peel, which removes more of the underlying layer of skin as it deeply exfoliates.