Eschar

Necrotic tissue

Eschar is a layer of dead tissue that commonly forms over a wound or burn.

Eschars can be caused by anything that destroys healthy skin, such as burns, trauma, infections, insect bites, pressure ulcers, and diabetic foot ulcers.

An escharotic is a substance (such as acids, alkalis, carbon dioxide, or metallic salts) that leads to eschar formation.

Eschars may require treatment to allow healing or to prevent or treat infection.