Doctors can be mistaken. After all what you get from them is only an "opinion".

PN typically, over time spreads and involves other parts of the body. Mostly the hands. But anywhere sensory nerves are, there can be effects. Postherpetic neuralgia is a good example.

So if Alan NEVER has symptoms somewhere else, after all these years, one would still think-- the back/sacrum or spine.
Whether this is "fixable" remains in the doctors' domain.

Get that Vit D test. See what happens when you fix any deficiency there!

I don't consider myself serious now with PN, like I used to be.
But I have it in my hands AND feet and always have.
All the causes of PN affect the body globally... not just the feet.

I'd also be interested to see how that foot cream works for him.
The arginine in it.... so keep me posted on that.