There may be other more serious causes of low back pain but these are rare. They include: a fracture-a crack or break in one of the bones in your back, osteoporosis-where bones lose density causing them to become weak and brittle, a slipped disc-when a disc bulges so far out that it puts pressure on your spinal nerves, spinal stenosis-the spaces in your spine narrow, spondylolithesis-a back bone slips forward and out of position, degenerative disc disease-the discs in your spinal cord gradually become worn down, osteoarthritis-a wear and tear disease particularly affecting the joints of your spine, rheumatoid arthritis-your immune system causes inflammation of the lining of your joints and surrounding structures. Low back pain may also be caused by an infection or cancer but these two causes are very rare.
Attribution: BUPA