I should also add that the two general neurologists who did my physical exam found areas of temperature loss on my upper body. They said it was small fiber neuropathy.

Later, the neuromuscular doctor only did a punch biopsy test on 2 spots of my right leg. The punch biopsy test was analyzed in house at UW Teaching hopsital and did not look at my sweat glands. I did not have a QSART test either. My guess is that it would have confirmed SFN since parts of my body are not sweating properly.

The neuromuscular doctor emailed me with my results, told me they were negative for SFN, and told me to get a referral to the pain clinic.

Either way, positive or negative results, he would have told me to go to the pain clinic. At UW they are only interested in diagnosing it and sending you on your way.