A herniated disc is when there is a problem one of the discs between vertebras that make your spine. The discs serve as rubbery cushions and the vertebrae are individual bones; the spinal disc has been described as a jelly donut with a soft center that has a tough exterior surrounding it. When this disc slips or ruptures and pushes through a crack in the vertebra, it is called a herniated disc. Unfortunately, a herniated disk can also cause problems with nearby nerves and can cause pain, as well as numbness and weakness in an arm or leg. It is typical for a herniated disc to cause a lot of pain for some people, and literally no symptoms for others.