What are the chances of gangrene to develop in an ingrown toenail?

Small. Unless you have bad circulation, severe diabetes or a bad ignored infection the chances would be small.
It would have. To get way out of hand from a combination of an infection, neglect and poor circulation.
Other diseases. If you have diabetes or circulation problems an ingrown toenail could become much worse.

Related Questions

What are the chances that I have gangrene from getting an ingrown toenail removed? I got them removed about 2 weeks ago, and one isn't healing well

Not that common. By not healing well what do you mean exactly? I highly doubt you have gangrene, but may be an infection that is still there. Also there could be piece of the nail left behind that is causing it not heal well. Gangrene usually happens in people who have some sort of underlying illness with poor circulation. Please follow up with your doctor or a podiatrist for further evaluation. Read more...
Slim. gangrene requires many factors like infection and poor circulation . Read more...

What are the chances of having an ingrown toenail?

See comment. If it is sore to touch then you better see a specialist. Read more...
If in doubt see Doc. Possible signs of having an ingrown nail may include: pain increased redness, swelling, bleeding, tightness or drainage at the nail margins. If pain does not improve, or you develop signs of infection, get it evaluated by a professional. Read more...

How do I treat an ingrown toenail?

Podiatrist. For mild ingrown toenail trim back nail and pack with cotton. For infected nail the inflammed tissue may need to be professionally removed by a foot doctor. If this is a recurrent problem there is an in office acid procedure which narrows the nail and prevents recurrences. Read more...
Soaks, podiatry. Soaking the toe in warm salt water can help. Not cutting toenails too short is important. However sometimes the nail edge needs to be removed. Most podiatrists can help with that. Read more...