The spinal column and its contiguous muscles, ligaments, and tendons are all designed to move, and limitations in this motion can make back pain worse.
Patients with ongoing back pain may find it takes weeks or months of stretching and other back exercises to mobilize the spine and soft tissues, but will find that meaningful and sustained relief of back pain will usually follow the increase in motion.
Learn more at http://www.spine-health.com/wellness/exercise/stretching-back-pain-relief