How can you tell im developing gangrene?

Dry or wet?: Either is fairly obvious and requires treatment. Wet unusually associated with progressive necrosis/death of tissues with a foul odor and occasionally has air in fhe tissues characterized by a crunchy sound when pressed. If usually occurs in immunocompromised patients in areas of compromised blood supply. The area is surrounded by increased redness. Dry gangrene tends to exhibit black tissue.

See your doctor!: If you're asking this question you need to be seen by a doctor! gangrene is very serious and can cause severe consequences. Don't guess... Go have your doctor check it out!