Burning on legs & feet..just the front of the legs..now spreading to upper thighs. no swelling;not painful, just burning. veins ok vitamin deficiency?

Burning on legs: Did you recently get a vaccination. Could be vitamin like B12 or from diabetes, or neuropathy from smoking ,HTN , or deficiency like calcium, magnesium potassium so would check all. Could be from disc disease,lyme, UTI or Guillan Barre if recent vaccination, rare MS. Since it is ascending would check it out ASAP. at urgent care/ doctor