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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.
Eventually, UV light causes the skin to burn, bringing pain, redness and swelling. You can get sunburn on cool, hazy or cloudy days. As much as 80 percent of UV rays pass through clouds. Snow, ice, sand, water and other surfaces can reflect UV rays, burning your skin as severely as direct sunlight.ltraviolet A (UVA) and ultraviolet B (UVB) are the two types of solar radiation most responsible for sunburn. Sunlamps and tanning beds also produce UV light and can cause sunburn. Melanin is the dark pigment in the outer layer of skin (epidermis) that gives your skin its normal color.