Most common problems what makes the patient's complaining at is back pain. As structures in the spine, joints, bone, nerves and muscle as might felt of back pain originated location. The disease increased greatly in the early teen years nowadays (earlier for girls 18 years than for boys 20 years) and significant towards 41 years old. Slip disc or a damaged muscles or tore ligament might cause it. Otherwise it occur as the manifest by the imbalance in the structure of the biomechanics of the spin... more »