For years now i have a problem on my leg. sometimes it hurts, burns, its numb, its really sensitive... its not the nerves and nobody knows what it is?

Need a neurologist : Your symptoms are concerning for some type of nerve issue. The most likely source would come from your spine. The next cause could be a pinched nerve in the leg itself or a tumor involving the nerve. Lastly a neurological disorder like ms could cause such symptoms rarely. Regardless, a neurologist can assess your exam and order appropriate imaging, electrical tests or blood tests for diagnosis.