Neuropathy is damage to the nerves, the fibers used to transmit messages from the brain to other parts of the body. A common complication of diabetes, diabetic neuropathy can develop over time as high blood sugar damages nerve fibers. Neuropathy can affect all parts of the body but peripheral neuropathy, the most common form of diabetic neuropathy, affects the feet, legs, arms and hands. Symptoms can include tingling or numbness, difficulty feeling hot/cold, pain and sensitivity to touch. Keeping your blood sugar in good control can help prevent developing or worsening neuropathy.