An<unk>  (; Greek:<unk> a) is a slough or piece of dead tissue that is cast off from the surface of the skin, particularly after a burn injury, but also seen in gangrene, ulcer, fungal infections, necrotizing spider bite wounds, tick bites associated with spotted fevers and exposure to cutaneous anthrax. The term<unk> ’ is not interchangeable with ‘scab’. An<unk>  contains necrotic tissue whereas a scab is composed of dried blood and exudate.<unk>  on the back of the knee on a patient with lymphangitis caused by Rickettsia sibirica Black<unk> s are most frequently attributed in medicine to cutaneous anthrax (infection by Bacillus anthracis), which may be contracted through herd animal exposure and also from Pasteurella multocida exposure in cats and rabbits. A newly identified human rickettsial infection, R. parkeri rickettsiosis, can be differentiated from Rocky Mountain spotted fever by the presence of an<unk>  at the site of inoculation.<unk>  is sometimes called a black wound because the wound is covered with thick, dry, black necrotic tissue.<unk>  may be allowed to slough off naturally, or it may require surgical removal (debridement) to prevent infection, especially in immunocompromised patients (e.g. if a skin graft is to be conducted). If<unk>  is on a limb, it is important to assess peripheral pulses of the affected limb to make sure blood and lymphatic circulation is not compromised. If circulation is compromised, an<unk> otomy, or surgical incision through the<unk> , may be indicated.
Eschar
Lesion
Blood blister
Blood squirt
Drustbed
Flashblood
Dream
Wart