Spondylosis is an aging phenomenon. With age, the bones and ligaments in the spine wear, leading to bone spurs (osteoarthritis). Also, the intervertebral discs degenerate and weaken, which can lead to disc herniation and bulging discs. Spondylosis is common. Symptoms are often first reported between the ages of 20 and 50. Over 80% of people over the age of 40 have evidence of spondylosis on X-ray studies. The rate at which spondylosis occurs is partly related to genetic predisposition as well as injury history.
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