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A. The sun produces invisible rays called ultraviolet-A (UVA) or ultraviolet-B (UVB) that can damage the skin. Too much sun can cause sunburn, skin texture changes, and skin cancers. Rashes also can be attributed to sunlight. Even on cloudy days, UV radiation reaches the earth and can cause skin damage.
Dangers of UV Radiation. Though the sunburn you had in the summer may fade, your body doesn't forget that exposure to UV radiation. Changes in your skin's DNA due to UVA and UVB rays can cause serious, long-term skin damage.One of the major downsides of UV radiation is that it advances the signs of aging. Premature wrinkling is common in people who have been exposed to the sun over long periods of time, as are age spots and uneven complexions.V radiation can also cause cataracts and weaken the immune system [source: AAD: Exam ]. But UV radiation is probably most notorious for causing various forms of skin cancer.