<unk>  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 animals include: red or reddish skin that is hot to the touch or painful, general fatigue, and mild dizziness. Other symptoms include blistering, peeling skin, swelling, itching, and nausea. Excessive UV radiation is the leading cause of (primarily) non-malignant skin tumors, and in extreme cases can be life-threatening.<unk>  is an inflammatory response in the tissue triggered by direct DNA damage by UV radiation. When the cells' DNA is overly damaged by UV radiation, type I cell-death is triggered and the tissue is replaced. Sun protective measures including sunscreen and sun protective clothing are widely accepted to prevent<unk>  and some types of skin cancer. Special populations, including children, are especially susceptible to<unk>  and protective measures should be used to prevent damage.
Sunburn
Windburn
Grocer's itch
Gangrene
Swimmer's itch
Photokeratitis
Pachyderma
Melasma