Suggest Treatment For Leg Pain

I have been having pains in my left leg for over a year, I have gone to nueroligist, chrioptactors, back doc. and still no answer. When i walk a long way, or stand for along time, my leg from my knee up feels like it is on file, burning. It even feels hot to the touch. I don't know how else to describe it, It feels numb to the touch, and feels swollen, but it don't seem to be. Do you have any ideas?