According to your MRI report (disk herniation and osteophytes), it seems that you are experiencing spondylosis. Spondylosis is a chronic, degenerative disease of the joints between the vertebrae. Spondylotic changes of the vertebrae press on the roots of the spinal nerves, causing the symptoms you mention. Every spinal nerve has 2 roots: an anterior and a posterior root. Pressure on the posterior roots causes sensitive symptoms (itching, burning, numbness, pain…) while pressure on the anterior roots causes motor symptoms (muscle weakness, fasciculations, twitching, pareses and paralyses). Your symptoms (pain and burning in the whole leg) are probably due to the spondylotic changes mentioned in the MRI report. You can consult an orthopedist or neurosurgeon about further treatment.