Mri shows no disc problems. Can upper back muscles nerves cause pain in this area and refer to upper leg. Burning/prickling. Not sharp pain.

Need more info. What level of spine was the mri--cervical, thoracic or lumbar? What neurological exam findings do you have? How did you injure your back, was it one acute accident or years of wear & tear? Likely, thoracic para spinal muscle spasm would not cause leg pain, but this really is a question for your neurologist. Good luck!