With a serious accident, osteoporosis or other causes of weakened vertebral bones, vertebral fractures in the lumbar spine may also occur. Chronic lower back pain
usually has a more insidious onset, occurring over a long period of time. Physical causes may include osteoarthritis, rheumatoid arthritis, degeneration of the discs between the vertebrae, or a spinal disc herniation, a vertebral fracture
I hope this helps. Take care and keep us posted.