Could Numbness And Burning Pain In Thigh While Walking Be Due To Bernhardt-roth Syndrome?

My thigh gets numb and there's burning pain when I walk for any length of time. My GP said I have a pinched nerve and prescribed neurontin. I want to know if I should take this before I do any amount of walking or take it once the pain starts. I've been searching the web and I think I many have Bernhardt-Roth syndrome. Could this be true?