Brief Answer:
She can get them checked...
Detailed Answer:
Hi,
Peripheral nerves are of 3 varieties - one that controls sensations, motor movement (muscle movements) and autonomic functions (
heart rate, blood pressure, perspiration, digestion, bladder and bowel functions). It's possible that these internal functions can be altered secondary to her
peripheral neuropathy and hence your wife's concerns are genuine.
I will recommend that you visit her local physician who can check her pulse, blood pressure (in sitting, standing and lying down position), take a detailed history of her digestive, bladder and bowel functions to make sure they are working right.
However symptomatically if she has no recurring
dizziness, palpitations, increased perspiration, no significant bladder and bowel issues, chances of internal (unseen) issues from peripheral neuropathy is unlikely.
Besides checking those, I will also insist you know what's causing the peripheral neuropathy. Since it is not
diabetes, may be there is another cause which can be treated to prevent progression.
Hope this makes sense. Let me know if you need clarifications.
Regards