Sun damage, also known as photoaging, refers to premature aging and skin deterioration caused by prolonged UV exposure. Over time, the sun’s harmful rays break down collagen, leading to fine lines, wrinkles, and loss of skin elasticity. It also triggers excess melanin production, causing dark spots, uneven tone, and hyperpigmentation. People with fair skin are at higher risk, but anyone exposed to the sun without protection can develop these issues. If left untreated, sun damage can become more severe and even lead to skin cancer.