Many back problems start when you strain a muscle in your back and the muscle then goes into spasm (contracted state). Unless you treat the muscle spasm (massage and move the back muscles) you then adopt a posture which maintains the posture of your back that you have when the strained muscle is in spasm. Since this is a physical problem you require a recognised physical treatment to remedy the problem, such as physiotherapy or osteopathy, to properly manipulate the affected region and get everything back to normal. A good physiotherapist/osteopath knows exactly where the source of the problem lies and because they are properly trained in anatomy and physiology, they understand exactly how to move your painful muscles/ligaments (which you have avoided doing yourself) to break the cycle of spasm and pain avoidance which would otherwise persist to maintain the back problem. If you undergo a course of physiotherapy/osteopathy possibly coupled with taking NSAID painkillers (non-steroidal anti-inflammatory drugs) you will generally find that many back conditions/sciatica will improve dramatically.
I wonder if acupunture would work on cars? If it does, it'll be cheaper than conventional car repair bills. 8)