Neuropathies:
1- Almost every statement about any type of neuropathy indicates "USUALLY", not ALWAYS.
Then,
2- Neuropathies mimic so many other conditions that nothing can easily be excluded in diagnosis. Ideopathic simply means that some other stuff/issues can affect what's going on. Autoimmune conditions/diseases; strokes or vascular issues; endocrine problems; nutritional deficiencies; allergeies; and about a ten dozen other illnesses can eigher overlap or affect the current 'round' of neuropathies.

So, it is not cast in stone that it HAS to start in the feet. However, WITH neuropathies the first thing to do is get tested and treated ASAP for the pain during testing and beyond...Treatments may change after tests results, but treatment is the most important thing to do/get first. Diagnosis is usually one done in hindsight, tho you mite have to move mountains to get one that's in the ball park.

Hang in there. 's - j