Sun damage and photoaging happen when your skin is exposed to ultraviolet (UV) rays from the sun or tanning beds. This exposure breaks down collagen and elastin, leading to wrinkles, fine lines, and uneven skin tone. Common signs include freckles, age spots, rough skin, and visible veins on the face, neck, and hands. The main cause of photoaging is UV radiation, which damages skin cell DNA and speeds up aging. Using sunscreen and basic skin care can help prevent and reduce this damage.