This is an old thread, but just wanted to share that I have many of these symptoms in case anyone is still following. I have non-length dependent small fiber neuropathy confirmed by skin biopsy which was below the threshold at the hip. Symptoms started 2 years ago with a tingling sensation in one ear, followed my numbness and nerve pain in one toe. 1 year ago I developed numbness throughout my hands which persists to today. 3 months ago I began experiencing diffuse fasciculations or "muscle twitching". They started instantly like someone flipped a switch and they continue to this day. Weirdly I also have a chronic cough, but only at night. I also have constantly sweaty hands and feet and frequent constipation from the small fiber neuropathy. So far the fasciculations are characterized as benign since EMG is normal, but its so scary that the other shoe will drop one day given their association with motor neuron disease. All of my bloodwork is normal, and they cant find any underlying cause, so my case is still considered idiopathic and I am receiving no treatment. I haven't found anything that helps on my own either. I have asked about Ivig but doctors say there is no basis if they cant find any markers of immune disorders in bloodwork. If anyone is still following this, please share any treatment that has been helpful for you. Thank you.