In many individuals, pre-diabetes has the same effect as full diabetes when it comes to triggering PN.

You should track down and read the various postings from "Brian". He had PN appear around the age of 49 and was ultimately diagnosed with pre-diabetes.

He dramatically changed his lifestyle (lower carbs, more exercise, etc.) and apparently dramatically improved his PN situation.

Pre-diabetes ultimately may or may not be your root cause, but it's a likely contender. You can use Google to find a number of scientific articles that are beginning to like pre-diabetes with perpherial neuropathy.

Keep us informed.