It an applicant states PAIN is the debilitating factor preventing them from work, since it is subjective, a doctor must indicate that you have a condition that would reasonably cause that degree of pain.

It sounds as if the neuro does NOT think your objective skin biopsy results indicating SFN sufficient for your pain levels and will not support your pain levels. THAT is a problem.

It is not enough to have objective test results, you must also have support from a physician, that the pain levels you experience are reasonable for that condition.

I believe that everyone on NT that suffers with SFN will attest to the fact that their condition DOES indeed cause such severe pain. But if your physician does not support that, it is a problem. The ALJ is NOT a doctor, he is a judge.

Please read the link I provided regarding pain. I think you will find it very beneficial.