Have you had nerve biopsies? Per my neurologist, large fiber neuropathy affects nerves affecting joints resulting in arthritis and autoimmune disease. I just learn that I have small fiber neuropathy, Dr ordered a muscle relaxer to calm the nerves, and I am walking normally again and don’t feel the pain. And why it took me about 3 years to get a diagnoses and medicine is beyond comprehension. When the neurologist told me I had neuropathy, he said it was nothing he could do for me. However, I found a chiropractor certified in neuropathy who is treating me with the goal of rebuilding the damaged nerves. So far, since Aug 2023, it stopped the progression and is trending in the right direction, albeit small progress. And with the medication, I don’t feel any pain right now.