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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 (also called erythema) is caused by overexposure to ultraviolet radiation (UV rays). While the symptoms are usually temporary (like red skin that is painful to the touch), skin damage is cumulative throughout a person's life and can develop into serious long-term health effects, including skin cancer. Mild sunburn results in skin irritation and redness and can be safely treated at home.