Hi, the good news is that peripheral nerves do have the ability to regenerate, it is a very slow process though.
It is solely up to you on how well you manage your sugars to start the healing process, as Sally said nerves don't like high spikes or lows, so it is a must to keep your sugars as close to non diabetic numbers as possible, don't take any notice of doctors that know zero about nerve regeneration, if the nerves are hurting they are still alive so they can get better over time.