A foot ulcer is an open wound on the foot, which has been present and not improving (or getting worse) for at least 2 – 3 weeks. Ulcers are usually on the bottom of the feet or at the ends of toes. The crater/ulcer can develop under thickened skin called callus.
Foot ulcers can become infected so look out for warning signs such as swelling, colour change in the surrounding skin, your foot feeling hotter than usual, pain or throbbing, pus or an unpleasant smell.