Can someone please explain to me the difference between non legnth dependant small fiber neuronopathy and small fiber neuropathy? If there is one.

Also, can a skin punch biopsy tell the difference or what type I have? I'm getting that done in the next few weeks.

I'm new to all this and am confused about the difference. I'm trying to figure out what I have...symptoms being all over body parasthesias, burning pain, from head to toe, sudden onset.

Thank you.