My condition only started this past May, two months after my second Moderna shot. I am 75 and never experienced this before. I take 900ng of gabapentin daily and the only supplement I've tried so far is a nerve vitamin combination called N3 which was recommended by a podiatrist which I take daily; however I have no idea if it helps or not since my burning or ice cold symptoms seem to be either ok or terrible based on the day and I just can't seem to figure out why, if it's random, weather, stress, etc. Very frustrating. And it's mostly at night when lying down so sometimes I go to sleep sitting up in a sofa chair with my legs and feet straight down. When I finally fall asleep I don't feel the symptoms even though they exist, usually 2 or 3 AM.