Exercise. There are many studies on the subject of lower back pain. The majority suggest the best method of controlling chronic lower back pain is exercise to create core strength and loose weight. I also suggest daily stretching and core strength exercises. You can find these exercises at: http://harvardneurosurgeon. Com/pt2.Html.
Depends on cause. Is the pain acute or chronic? Always use conservative measures before going onto more involved treatements. Pt/exercises to stretch and strengthen the paraspinal musculature is key to keeping the back healthy. If these fail, more therapeutic modalities at pt can be tried, along with medication treatments, and sometimes, injections into the parts that are causing the problems. Check with your doc.