wrinkle

Wrinkle is a small fold or ridge in a surface; most commonly it refers to lines that appear on the skin as people age, but it can also describe folds in fabrics, paper, or other flexible materials.

In human skin, wrinkles form when the skin loses collagen and elastin fibers and the dermal-epidermal junction becomes thinner. Aging and sun exposure contribute to intrinsic and extrinsic aging, with factors such as smoking, dehydration, and genetics influencing onset and severity. Dynamic wrinkles result from repeated facial movements, while static wrinkles are visible at rest. The distribution and depth of wrinkles vary by anatomical area, skin type, and lifestyle.

In fabrics, wrinkles occur when fibers or yarns become creased due to moisture loss, pressure, or movement. Natural fibers tend to wrinkle differently from synthetic ones, and fabric finishes can affect wrinkle resistance. Prevention involves appropriate laundering, drying, ironing, and selecting fabrics or blends with suitable wrinkle properties. Some textiles are treated with anti-wrinkle finishes to improve stability.

Management and treatment of skin wrinkles span cosmetic and medical approaches. Topical retinoids, moisturizers, and sun protection are commonly recommended for maintenance and slow progression. More intensive options include chemical peels, laser resurfacing, dermal fillers, and other procedures, typically guided by dermatologist evaluation and patient goals. Wearable and lifestyle factors, such as sunscreen use, smoking cessation, hydration, and healthy sleep, can influence skin condition over time. Wrinkles are a natural part of aging and vary widely in appearance and impact.