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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.
1 Sunburn is an inflammation of the skin caused by overexposure to UV radiation from the sun. 2  UV radiation damages the skin and also can damage the eyes. 3  UV rays are most intense at noon and the hours immediately before and after (between 10 a.m. and 4 p.m.).  Immediate symptoms of sunburn are.