A burn is damage to the skin or deeper tissues caused by exposure to high temperature, chemicals, electric current, or radiation. The severity of the burn depends on its depth, area, and location, as well as on the age and general condition of the affected person.

Superficial burns are usually manifested by redness, pain, and slight swelling. Partial-thickness burns may be accompanied by the formation of blisters, and with a full-thickness lesion, all layers of the skin are destroyed and pain sensitivity may decrease. Deep, extensive, chemical, and electrical burns require professional medical attention.