I haven't been "officially" diagnosed with PN, but do have all the primary symptoms of small fiber neuropathy. One of the things I noticed fairly early on is that my feet were sweating more than usual. This symptom seems to track along with the amount of burning I'm feeling at the time. The more the feet are burning, the more they sweat. I also usually have worse burning in the right foot than the left, and the right foot sweats more than the left. I have assumed that is part of the disease.