Diabetic Peripheral Neuropathy is a form of nerve damage involving the hands and/or feet. It is one of the most common complications that can occur if you have diabetes. While the symptoms are usually felt in the feet and legs, high blood sugar can injure nerve fibers throughout your body. Depending on the affected nerves, symptoms can range from pain and numbness in the extremities to problems with the digestive system, urinary tract, blood vessels and heart. For some people, these symptoms are mild. For others, diabetic neuropathy can be painful, disabling and even fatal.