The intervertebral discs that separate the vertebrae of the spine let the spine bend, flex, and rotate, and also cushion the movement between the bones. Each disc has a tough outer layer ("annulus fibrosus") and a soft inner layer ("nucleus pulposus"). When a disc cracks, the nucleus protrudes through the annulus, creating a condition that goes by many names, including a "herniated disc," "slipped disc," "ruptured disc," or "prolapsed disc."
Herniated discs often cause no symptoms. However, if the disc irritates a nerve, it can cause back pain, along with numbness or weakness in your back and in your leg or arm.
Discs are largely made of water. As you age, their water content decreases, causing the discs to become less flexible and shrink. This degeneration makes the discs more susceptible to rupture with even a minor strain or twist.
Aside from age, the following factors increase the risk of a herniated disc:
Herniated discs occur most often in the lower back. The symptoms of a lumbar herniated disc include:
See a doctor immediately if you lose control of your bladder or bowels, or you have numbness or weakness in one or both legs.
The symptoms of a cervical (neck) herniated disc include:
Because the neck has so little space for the spinal cord, cervical herniated discs are potentially more dangerous than lumbar herniations.
Thoracic herniated discs that cause symptoms are uncommon, and the specific symptoms depend on where the disc is cracked.
Most people with herniated disc symptoms get better in one to two months with conservative treatment. Your doctor may also recommend the following:
If other treatments don't work, a steroid (cortisone) injection into the area around the nerve and disc may reduce pain and inflammation, but is usually used only in an effort to avoid surgery.
According to researchers at Cedars-Sinai, less than 10 percent of people with a herniated disc may require surgery. Surgery may be appropriate if you have progressive nerve damage or severe weakness or numbness, or if other treatment doesn't relieve your pain.
American Academy of Orthopaedic Surgeons Staff. (n.d.). Herniated disc. Retrieved March 8, 2010, from http://orthoinfo.aaos.org/topic.cfm?topic=A00334
Cedars-Sinai Staff. (n.d.). Herniated or ruptured disc. Retrieved March 8, 2010, from http://www.csmc.edu/5274.html
DeWitt, D. (n.d.). Upper back pain from http://www.spine-health.com/conditions/herniated-disc/upper-back-pain-a-thoracic-herniated-disc
NYU Langone Medical Center Staff. (n.d.). Herniated disc. Retrieved March 8, 2010, from http://www.med.nyu.edu/conditions-we-treat/conditions/herniated-disc
Mayo Clinic Staff. (n.d.). Herniated disc. Retrieved March 8, 2010, from http://www.mayoclinic.com/health/herniated-disc/DS00893
Ullrich, P. (n.d.). What's a herniated disc, pinched nerve, bulging disc...? Retrieved March 8, 2010, from http://www.spine-health.com/conditions/herniated-disc/whats-a-herniated-disc-pinched-nerve-bulging-disc
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