It usually happens when the fibers that make up the annulus—the tough outer covering of the intervertebral disc—either break or separate. While an annular fissure is also called an annular ...

A disc becomes herniated when you tear the annulus, the basket-weave-type supporting structure of the disc, by twisting. This weakens the structure and makes it work abnormally. A herniation is ...

Few injuries are as suddenly and thoroughly debilitating as a herniated disc. If you've experienced one, you know how quickly you can go from feeling completely normal to all at once having ...