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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.
Sunburn is the term for red, sometimes swollen and painful skin. It is caused by overexposure to ultraviolet (UV) rays from the sun. Sunburn can vary from mild to severe. The extent depends on skin type and amount of exposure to the sun.