Sun damage describes premature aging of the skin and skin cancer due to overexposure to ultraviolet (UV) rays. There are two types of UV rays that cause damage to the skin: UVA and UVB. UVA are longer waves that give you a tan, but they also activate the skin in an unhealthy way. UVA rays are not responsible for sunburns. They penetrate the skin much deeper than UVB rays and trigger premature aging and skin cancer. UVB rays are shorter waves that are responsible for sunburns, but they can also accelerate early signs of aging. UVB rays are considered the most common cause of skin cancers.
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