@italapino You know your varied and strange nerve responses give me recall to the bout of tick borne illness I had in 2016. I had been free of my really bad PN symptoms of electrical shocks in feet for over 3 years but then all of a sudden had the strangest onset of these pains while sitting in a very comfortable chair. Two days later came all sorts of joint pain, headache that would come and go, and weird hot and cold sensitivities. After several days of this I went to doctor and they started doing tests, and my white and red blood cell counts were crazy bad. After little help from them, and constant night sweats that caused me to change pillows and sheets, I ended up in hospital totally dehydrated and they treated me with IV's and antibiotic for a tick borne illness even though no test results showed positive for the disease. I was totally better within 4 or 5 days. Their tests are only partially successful in identifying some tick diseases. Originally i had thought it was just PN when the shocks came on, but it was only the tip of the iceberg on that illness. So you should perhaps consider where you have been and whether it could be just a dormant disease coming back to settle in for a visit. May be a long shot, just thought I would pass it along since it came on and progressed so suddenly for you. Good luck on finding an answer, hope it isn't PN.