Diabetic neuropathy is a type of nerve damage that can occur if you have diabetes. High blood sugar (glucose) can injure nerves throughout your body. Diabetic neuropathy most often damages nerves in your legs and feet. Depending on the affected nerves, diabetic neuropathy symptoms can range from pain and numbness in your legs and feet. This type of neuropathy may also be called distal symmetric peripheral neuropathy. It's the most common type of diabetic neuropathy. It affects the feet and legs first, followed by the hands and arms. Signs and symptoms of peripheral neuropathy are often worse at night, and may include:

•  Numbness or reduced ability to feel pain or temperature changes
• Tingling or burning sensation
• Sharp pains or cramps
• Increased sensitivity to touch — for some people, even a bedsheet's weight can be painful
• Serious foot problems, such as ulcers, infections, and bone and joint pain

Source: Mayo Clinic