Hi @anniemae, you mentioned earlier that you were diagnosed with idiopathic progressive neuropathy. Idiopathic means that they could not determine the cause of your neuropathy when they did the testing. Mine is also idiopathic (small fiber peripheral neuropathy). The neurologist told me it was most likely hereditary and I think he's correct. I've been corresponding with a cousin who has it and I'm pretty sure my sister who passed away a few years ago also had it. This short video by Matthew B Jensen Assistant Professor of Neurology, University of Wisconsin that gives a good explanation of how the different neuropathies are diagnosed.