<unk>  is the drying out of the spongy interior matrix of an intervertebral disc in the spine. Many physicians and patients use the term<unk>  to encompass several different causes of back pain or sciatica. In this article, the term is used to describe a<unk>  herniated disc. It is thought that<unk>  causes about one-third of all back pain.
Lumbar disc disease
Degenerative disc disease
Spinal disease
Spinal disc herniation
Spinal stenosis
Lumbar spinal stenosis
Spinal tumor
Discitis