Ulcers on the foot may not always come with pain, but they are serious conditions that should be evaluated by a medical professional. Most foot ulcers are caused by pressure and are located on a weightbearing part of the foot. They commonly start out as a callus with a bruised appearance under the callus. It is important to have these areas professionally evaluated before they progress. People with neuropathy, loss of sensation, should check their feet multiple times a day to make sure these types of issues are caught early in the developmental process. An x-ray, MRI or CT scan can be used to diagnose potential issues that can arise from a wound on the foot.