Wrinkles, also known as creases, are folds or lines that form on the skin as a result of aging, sun exposure, and other environmental factors. They occur when the skin loses its elasticity and moisture, leading to a less smooth appearance. Common areas for wrinkles include the face, neck, and hands. Various factors contribute to the development of wrinkles, including genetics, lifestyle choices, and UV radiation from the sun. While they are a natural part of aging, some people choose to use skincare products or undergo cosmetic procedures to reduce their appearance.