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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 (first-degree burns). Sunburn is skin damage from the sun's UV rays. Most sunburns result in redness, warmth to the touch, and mild pain, affecting only the outer layer of skin (first degree burns). Sunburn usually appears within hours after sun exposure and may take several days to weeks to fade.