When nerves are damaged due to uncontrolled diabetes, a lack of sensation can start in the legs and feet. Patients may notice an inability to feel hot, cold or painful sensations. If you suffer a wound on the foot and fail to feel it due to diabetic neuropathy, and the cut or sore isn’t immediately addressed, an infection can transpire. Diabetic neuropathy can also cause the muscles to malfunction, causing misalignment or focused pressure. An estimated 10 percent of people with diabetes bear foot ulcers due to nerve damage.