Injury to the skin, with erythema, tenderness, and in some extreme cases blistering, following excessive exposure to sunlight; produced by ultraviolet rays not filtered out by clouds or water.

Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, usually from the Sun. Common symptoms in humans and other animals include red or reddish skin that is hot to the touch or painful, general fatigue, and mild dizziness...