Hi John. Thank you for your quick response. I have an unclear diagnosis. The only test that can confirm SFN is the skin punch biopsy and these tests are not done in my country. My Bloodwork has not clearly indicated a root cause. I’m stuck with no diagnosis or path forward because what has been tested for so far (and I’ve had many many blood tests over several years) has not been remarkable and there is no “proof” of neuropathy besides all the pain in discomfort I feel that can’t be observed from the outside. Wondering if there is a more specific set of tests for antibodies that would indicate post viral neuropathy beyond ANA. My symptoms started after unusually “powerful” virus. Thanks