There could be more than one reason for your back pain. First try to understand what causes your problem for example: do you have all day sitting in desk job, do you lift weight frequently, your sleeping position etc.,
I had this issue couple of months back; i had severe pain which shoots down till my toes from hip. I knew it has something do to with the Nerve. I visited an Ortho and took an MRI and we found out I had a Slip Disc problem. (FYI..I am in a software job and I sit all day, also due to my height and my incorrect seating posture this problem developed). While my doctor suggested an Operation, I was shitty scared and was researching in internet about the problem. One of my friend suggested an alternative treatment "YOGA". I thought why not give it a try, I found an institute where they specialize in treating body pain through yoga, I had to stay there for couple of weeks and do the routine. At the end of the second week, I wasn't feeling any better, but the people in the institute asked me to keep faith and asked me continue the exercise.
I continued for a month and suddenly like a magic my pain got disappeared and never had again till today. So, the point is try to find out what is causing you pain and try to do some research and find the best physio or exercise.
Happy to help you, if you need more information about my problem and how I got rid of it. All the best!!