I think we should all be reviewing our symptoms with our neurologists and primaries. Cold sensations could be circulation issues, but also having heat sensations at times are not an indication of circulation. There are a lot of articles listing these heat/cold sensations as a Neuropathy symptoms for some (esp those with Diabetes). Some neuropathies affect our internal thermostats. My PN all came on within 10 days (from walking to wheelchair, and it took 6 months for me to get out of the wheelchair). It came with the immediate alternating intolerable heat/cold sensations in hands & feet, with my Neurologists instantly knowing that it was part of my neuropathy, as little as they know about it. I’ve had circulation tests and all is clear. I wouldn’t rule anything out, but we all need to discuss our symptoms with our medical doctors and ask that all pertinent tests are performed to try to get to the root cause and hopefully a correction.