Each level in the back is a different joint ... The most common cause of a herniated disc is a twisting type of injury. It can be caused by a fall or lifting something heavy.

Lumbar disc herniation is one of the most common structural changes in the lower back and the most common cause of radiating pain, or sciatica, in the leg. Hereditary risk factors for disc herniations ...

Herniated discs appear as less than 25% of the total disc circumference. They also are different based on the type. These ...

Few injuries are as suddenly and thoroughly debilitating as a herniated disc ... twisting to the side stresses all the different possible motions of the disc segment at the same time," he explains.