In dermatology, "peeling" primarily refers to chemical peels, a skin resurfacing treatment using chemical solutions (like AHAs, TCA, salicylic acid) to exfoliate outer skin layers, revealing smoother, clearer skin for concerns like wrinkles, scars, acne, and pigmentation, categorized by depth (light, medium, deep) with varying downtime. It also describes the natural skin shedding (desquamation) after sunburn or injury, which is your skin's healing process, requiring gentle care and sun protection.