Hello, I have studied your case. As per your history there can be Tuberculosis of spine leading to back pain and weight loss. Another possibility of disc compression. When such patient comes to my hospital we usually take x ray spine or if required MRI to see for any nerve compression. Medication like methylcobalamine with muscle relaxant and analgesic will reduce pain; you can take them consulting your treating doctor. You may consult physiotherapist for further guidance. He may start TENS, or ultrasound which is helpful in your case. Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Take care.