@liloldlady

EMG/nerve conduction studies are done by a neurologist to test peripheral nerve health in arms/hands, legs/feet. I think of it as how well your muscles receive communications from your brain through your spinal cord to your nerves. This test can determine if there is large nerve fiber damage impacting the signal to muscles.
1. https://my.clevelandclinic.org/health/diagnostics/4825-emg-electromyography
2. https://www.mayoclinic.org/tests-procedures/emg/about/pac-20393913
3. https://resources.healthgrades.com/right-care/electromyogram-emg/10-conditions-diagnosed-with-an-emg

@liloldlady
Small fiber neuropathy is tested best by the gold standard of skin punch biopsy. They look under a microscope to determine if there is small fiber nerve damage.

Small fiber neuropathy can be caused by diabetes, drinking alcohol, vitamin deficiencies or toxicities, chemotherapy, etc. if they can’t find a cause, it is classified as idiopathic which means they don’t know the cause. Treatment is usually treating the cause, if possible, to stop or slow the progression and medication or supplements (like gabapentin or alpha Lipoic acid). Symptoms can include pain, burning, tingling, pins and needles feeling, numbness, etc. that can start in your feet and travel upward. Small fibers can affect temperature and skin sensations and peripheral/autonomic nervous systems (arms/legs/hands/feet and organs).
1. https://my.clevelandclinic.org/health/diseases/17479-small-fiber-neuropathy
2. https://www.hopkinsmedicine.org/neurology-neurosurgery/specialty-areas/peripheral-nerve/small-fiber-sensory-neuropathy
3. https://www.health.harvard.edu/diseases-and-conditions/the-big-pain-of-small-fiber-neuropathy
4. https://neuropathyspecialists.com/neuropathy-blog/b/small-fiber-vs-large-fiber-neuropathy-understanding-the-differences-causes-treatment-and-outlook
5. https://www.medicalnewstoday.com/articles/small-fiber-neuropathy