Sunburn is a form of
radiation burn that affects living tissue, such as
skin, that results from an overexposure to
ultraviolet (UV) radiation, commonly from the
sun. Common symptoms in humans and other animals include
red or reddish skin that is hot to the touch,
pain, general fatigue, and mild dizziness. An excess of UV radiation can be life-threatening in extreme cases. Exposure of the skin to lesser amounts of UV radiation will often produce a
suntan.