Discs lie between the spinal bones (vertebrae). They serve as shock absorbers. Discs protect the spine and help it stay flexible. Degenerative disc disease is wear and tear on these discs. This wear and tear causes pain and other symptoms. Some degeneration is normal as you age. Not all degeneration will result in symptoms of this disease.
The disc loses fluid and is not as resilient as a normal disc. The fibrous tissue, which holds the disc material in place, may suffer small tears. These tears lead to further damage. There is some evidence that genetics may play a part for some people.
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