Afull-thickness pressure injury is covered by a layer of black nonviable, denatured collagen. what term is used to describe this condition?

Wound eschar

Explanation:

A wound eschar can be define as a mass of dead tissue that sloughs off from a healthy skin after an injury occurs. It is a slough off piece of dead tissue that actually casts off typically from the surface of the skin. It occurs typically after a burn injury but can also be seen cases of ulcer, spider or tick bites, fungal infection, and gangrene.  

As a result of tissue destruction in depth, the wound eschar formed by any of the above mentioned reason appears as a layer covered by black or gray nonviable denatured collagen.

depends where it is? i got mine on my arm and from 1-10 it was a 3 different spots react differently