Toby - polyneuropathy is peripheral neuropathy [PN] from what I have read. I have PN, idiopathic. Most doctors ask if I'm diabetic as that is a common cause of PN and NO I am not! I developed this well after ITP diagnosis - no cause has been found and because I now refuse the medications that are tired for PN because of the side effects I am only doing acupuncture [once the office opens again] and 600mg of Alpha Lipoic Acid a day which has been proven to help & for me it helps a little bit. Are you seeing a neurologist?
Sorry you have this to deal with now - take care!
What is Polyneuropathy?
Polyneuropathy, the most common form of a group of disorders known as peripheral neuropathy, is caused by damage to peripheral nerves (defined as all nerves beyond the brain and spinal cord). Peripheral nerves travel from the spinal cord to muscles, skin, internal organs, and glands. In polyneuropathy, many nerves throughout the body malfunction at the same time.
"Instead of wasting your time worrying about symptoms, just get it checked out" -Nieca Goldberg, MD