I was wondering what are the signs of gangrene?

Blackened Tissue: Death of the tissue. Early it may appear 'dusky' or darkening red color going towards black, and may have soreness well above the area, indicating poor circulation. Important to be seen by md as early as possible to try to avoid very serious complications.

Dark: Dark, foul smelling tissues wth possibility of further tissue destruction, can be classified into dry or wet gangrene.