I am researching thyroid dysfunction and peripheral neuropathy. Those with hypo often have low core temperatures. Mine is usually 96.8F.

I see some PhDs believe hypothyroidism can lead to peripheral neuropathy, including:

Norman Latov, MD, PhD, Professor of Neurology
Director, Peripheral Neuropathy Center
Weill College of Medicine
Cornell University, NY

He believes testing should include thyroid function as well as B12 and kidneys. Most of the talk nowadays is about B12.

I was going to get tested for B12. I think now I'll find a local place that does thyroid and kidney testing.

It's a pretty long list of recommended tests. Anyone with idiopathic PN should leave no stone unturned.

"Peripheral neuropathy may be caused by severe, long-term, untreated hypothyroidism."--Todd B. Nippoldt, M.D., endocrinologist, Mayo Clinic