What is a Herniated Disk?

herniated disk


Many people have back pain that keeps on returning. Usually it is hard to say what the exact cause is. But if you have pain that radiates down your leg and into your foot, it may be a sign of a slipped spinal disk, or “herniated disk.”

The spinal disks are located between the spinal vertebrae. They have an elastic casing made of cartilage and a gel-like center (nucleus pulposus). A slipped disk occurs if the spinal disk tissue pushes out, or “herniates,” between the vertebrae. This herniated tissue may put pressure on the spinal nerves and irritate them.

A slipped disk can be very unpleasant. But the good news is that the symptoms usually go away on their own within less than six weeks in most people with this problem. But not everybody who has a slipped disk will have symptoms.


A slipped disk can cause very sudden and severe shooting pain. Slipped disks in the lumbar region are the main cause of sciatica (sciatic nerve pain). Sciatica describes pain that radiates down one leg and into the foot. As well as the typical radiating pain, a slipped disk can also lead to pain in the low back region.

In rare cases, numbness in the buttocks or signs of paralysis may develop in addition to the pain and restricted movement. These symptoms are signs of a more serious problem, like nerve damage. Immediate medical attention is needed if the functioning of the bladder or bowels is affected too. That is called “cauda equina syndrome” (CES), and is a medical emergency.

But a slipped disk doesn’t always lead to noticeable symptoms. This can be seen in studies in which adults who didn’t have back pain were examined using magnetic resonance imaging (MRI). More than 50 out of 100 people who were examined had a bulging disk. In about 20 out of 100 of them, the core of the disk had already broken through several layers of its casing or had even entered the surrounding tissue, but without causing any noticeable symptoms.

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