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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.
UVB as well as UVA rays may cause damage to skin. UV rays may bounce off water, sand, snow, and other surfaces causing sunburn. Persons with certain pigment disorders (albinism, lupus, porphyrias, vitiligo, and xeroderma pigmentosum) and individuals with fair skin are at most risk of sunburn.