Low back pain can be caused by several factors. 1. pain from soft tissue diseases, such as low back pain, lumbar myofasciitis or interspinous supraspinous ligamentitis, can cause low back pain and restricted movement. 2. pain in the low back can also be caused by bony factors, such as tumors of the low back or tuberculosis of the low back, which can also cause low back pain and restricted movement. 3. lumbar intervertebral disc The pain can also be caused by other connective tissue diseases, such as idiopathic arthritis or reactive arthritis, which can also lead to pain and limited movement of the back. 5. Ankylosing spondylitis can also lead to pain and impaired movement of the back.