Thank you for posting this. It's also helpful for me. I have a number of degenerative issues in my cervical spine. Where did you acquire this image from? I ask because I've been led to think that mechanical issues in the cervical spine can't cause symptoms in the head and face - I have numbness, tingling, twitching and electrical current feelings on my face and head - but it seems like your image is claiming the contrary, at least with respect to certain symptoms. My MRI showed no signal change, but in two places there was mild cervical spine compression. Thanks.

I found it doing a search for spine chart dermatomes. I believe most are chiropractic based.
here is a results page of them -
https://www.google.com/search?q=spin...w=1360&bih=624


If you have mostly mild spine issues, soft tissue can cause quite a bit of pain/symptoms.
triggerpoints can cause referred pain /symptoms
muscle imbalances or slight misalignments could be an issue also
even poor posture can create problems

If you haven't been assessed by highly qualified PT/ chiropractor, I would ask your MD for referral or seek one out yourself, just to have a better idea if some sx might be treatable with proper therapy.

Thank you. Well, I will say that I have been diagnosed with SFN via a skin biopsy, but I suppose it needn't be just the SFN causing issues. But if I'm not mistaken, the neuropathy or most of it, can't be caused in an upward trajectory. Or perhaps it can, via referred pain. Well, I'm working with the PT on the spine issues, and have lost about 50 lbs, so that's something. I'll look into this more. Thanks again for bringing it to my attention.

what were your values with skin biopsy if i may ask

If you're asking for mine, I believe it was 3.3 mm, whereas the lower limit was 5.2 or .3