Aging changes in the skin are a group of common conditions and developments that occur as people grow older. Skin changes are among the most visible signs of aging. Evidence of increasing age includes wrinkles and sagging skin. Whitening or graying of the hair is another obvious sign of aging. Skin changes are related to environmental factors, genetic makeup, nutrition, and other factors. The greatest single factor, though, is sun exposure. This can be seen by comparing areas of your body that have regular sun exposure with areas that are protected from sunlight.