With age, our intervertebral discs lose their flexibility, elasticity and shock-absorbing properties. The ligaments that surround the intervertebral disc and are called annulus fibrosis become brittle and are more easily torn, causing back pain. One of the most common causes of back pain is DDD or degenerative disc disease. It refers to changes in wear in the individual spinal discs in any part of the spine. The process of degeneration of the spine can lead to local pain, stiffness and reduced activity.