Here's how to identify and prevent gangrene

Gangrenous tissue typically becomes discoloured, ranging from pale purple to black. The skin may become dry, hard and shriveled, with a clear line separating the dead tissue from healthy tissue. — TNS

Gangrene, which refers to tissue death caused by a severe shortage of blood supply or serious bacterial infection, occurs in the lower extremities. It is more common in the toes than other parts of the body.

Gangrene tends to happen more often among people with peripheral artery disease, a common circulatory problem in which narrowed arteries reduce blood flow to the limbs.