A foot ulcer is an open sore on the foot. It can be a shallow red crater that involves only the surface skin but can also be very deep. A deep foot ulcer may be a crater that extends through the full thickness of the skin. It may involve tendons, bones and other deep structures.
Foot sores are symptoms often associated with the following conditions:
Charcot foot is a foot deformity that results from nerve damage in the foot or ankle.
Diabetes is a disease that occurs when your blood glucose, also called blood sugar, is too high.
Equinus is a condition in which the upward bending motion of the ankle joint is limited.