Small fiber neuropathy?

I never had a biopsy to dx it. I’m wondering if I have the biopsy does it make a difference in the therapies? A year ago I was dx’d with severe chronic nerve damage in lumbar and cspine: polyradiculopathy.

I have severe pain and spasms in lumbosacral back, legs and feet since 2021.

In the summer of 2023 I started (an continue having) get spasms in the trapezeous muscles on the right.

I’m currently flaring with bad pains to both shoulder that is crippling then after a long while it disappears. I developed lightning like pains to the bottoms of my feet and toes. The only thing that seemingly helps the surface pain is the lidocaine cream I apply. So far…

The neuromuscular doctor said last year no long fiber neuropathy per the nerve conduction study. She said I’d need a biopsy to determine if i have sfn.

An old nerve doctor said I had demyelination in left leg she thought secondary to diabetes. WEll, the diabetes hasnt climbed to damaging enough numbers to put me in flair much less cause the demyelination.

The foot dr last week gave referral for feet, for neuropathy and balance. So this confuses me. It all does.

I’d like to know if SNF can move around the body and cause the tingling in forarms and fingers and can the pain in SNF affect the very surface of the skin?

If someone can make sense of what Ive written I’d appreciate any help insight or feedback.

I have not received a diagnosis regarding the polyradiculopathy. I’m going to press the doctors for answers now because it’s really out of control.