I think I have the same thing going on. I recently had tmj surgery but before that I have had a burning sensation, first in the right thigh but then the left now both. To me it feels like bolts of electricity going through my veins and it can bring me to my knees. It has been some time since you posted. Have you found any relief?
laminectomy, ALIF, and posterior lumbar fusion ,etc,they can relive your pain,but they can't completely get rid of inflammation around your problem area,inflammation was due to soft tissue injury. that lead to tissue sensitive,then affect nerves,then burning sensation.so,keep movement and maybe acupuncture can help......