[hinckley buzzard]

One problem that can cause PN is poor circulation. That can be due to diabetes or just some obscure onset like peripheral vascular disease without diabetes. Multiple Sclerosis also commonly results in neuropathy, as can chronic excessive alcohol use. It is often progressive and can indeed become disabling. It may or may not be accompanied by nerve pain, which can be bad but controllable with medication.

It is important to avoid injury to feet or legs, especially if poor circulation is implicated. I have seen a number of people with PN from various causes, and as far as I know it is not reversible, but progression may be quite slow. Initially it may be a mere minor nuisance, and let's hope it stays that way. Good luck.

[mupcat]

Multiple Sclerosis also commonly results in neuropathy, as can chronic excessive alcohol use

No, sure it's not MS, and he hasn't had a drink in many years.