<s>[INST] I have a  sciatic nerve problem. I have had back surgery before for my sciatic nerve and narrowing of spinal cord which was successful. Recently I had a total knee replacement and while doing PT, I injured my sciatic again and now my leg is numb and I am getting a shocking on my upper leg and burning and can not stand anything to touch my leg when this happens, what should I do, [/INST] Hi, Thank you for posting your query. Your symptoms are suggestive of a nerve compression in the lumbar region. This has resulted in low back pain, articular pain in the leg and numbness. The extent of nerve compression can be assessed with the help of MRI limbo sacral spine. Initial treatment would consist of bed rest, physiotherapy and medications such as pregabalin or gabapentin. Most people with symptoms similar to yours would improve in three to four weeks time. If you do not improve, then, epidural injections or surgery may be needed. I hope it helps. Best wishes, Chat Doctor.  </s>