I had symptoms before diagnosis, like a rolled up sock under the balls of my feet all the time. As I lowered BG, I also got more trouble with cold feet keeping me awake at night. To complicate that, I also have Reynauds syndrome, so hands and feet get cold very fast. The only real change I have had is since going to keto diet, with fasting. I get days now with only very minor symptoms, and seem to keep warmer extremities which means less trouble with cold feet keeping me from sleeping. Not cured, but improved. I have had other symptoms when lowering BG, like sometimes the urge for sudden need to urinate, which was not quantity related. That has entirely gone now. Its been interesting, if a bit puzzling!