Causes of Lumbar (Low Back) Pain
Low back pain can be caused by problems with any part of the lumbar spine. A disk can herniate (push out) and press on a nerve. Vertebrae can rub against each other or slip out of place. This can irritate facet joints and nerves. It can also lead to stenosis, a narrowing of the spinal canal or foramen.
Pressure from a disk
Constant wear and tear on a disk can cause it to weaken and push outward. Part of the disk may then press on nearby nerves. There are two common types of herniated disks: