I’ve got some neuropathy in my feet - undiscovered until I consulted a neurologist for sleep issues (I have RLS, which is a neurological disorder). He did the usual tests involving balance, touching the feet with tuning fork, etc., and noted the neuropathy.
I did get the pleasure of evoked-potential testing (had had an electromyelogram and nerve conductance testing 10+ years earlier) which was a) thoroughly unpleasant, and b) said “yep, seems to be some lack of communication going on”.
He also ran some blood tests to rule out some causes like Lyme disease, B12 deficiency, and syphilis (which was funny - I didn’t recognize the name/code on the lab results, so did some googling, and started cracking up: I’m quite sure he didn’t mention it by name as some people would be Offended).
End result? a big :::shrug:::. The notes say “polyneurophathy…nerve conduction normal arms…distal conduction in lower extremities”… myotatic reflexes reduced in ankles… distal sensory loss… gait and coordination are normal" (that last is hysterical - clearly the man had never seen me trip over my own damn feet). They also noted something about sedimentation rate (slightly high) and M-spike (none). I seem to recall seeing “benign familial neuropathy” somewhere but can’t find it in the records I have right now.
I’m assuming that “distal conduction in lower extremities” is a transcription error, should be something like “reduced distal conduction” or something, right?
I’ve actually noticed increased numbness since then, which is fairly strongly correlated to some seating issues since I’ve been working from home more. Blood sugar is a titch high but not in the diabetic range and definitely not in the ranges that would lead to diabetic neuropathy.
OK, the tl/dr version is that basically sometimes they just don’t figure out the cause, but if they’ve ruled out all the Very Scary Stuff, you can try managing it on your own, including doing your best to note when the symptoms are better vs. worse. You could try wearing some soft braces designed for carpal tunnel and see if that makes any difference, also check out your sleep position to see if that’s putting pressure or forcing unusual angles in your wrists.