Sunburn is an inflammation of the skin caused by overexposure to the ultraviolet (UV) rays of the sun. Therefore, UVB, or ultraviolet B, radiation, UVA, or ultraviolet A, penetrates more deeply than UVB but is less likely to cause an immediate burn. Rather, it causes wrinkling and leathering, damages connective tissue, and may be crucial in the development of melanoma, the most deadly of skin cancers.
