(HealthDay News) -- You've probably heard people say they have a "slipped" or "ruptured" disk in their back. What they're describing is a common source of lower back pain called a herniated disk, the American Academy of Orthopaedic Surgeons says.
Disks are rubbery pads between the vertebrae that make up the spinal column. In the middle of the spinal column is the spinal canal, which contains the spinal cord and other nerve roots. The disks between the vertebrae let the back bend and act as shock absorbers.
The outer edge of the disk is a ring of cartilage called the annulus. The center of the disk is a gel-like substance called the nucleus. A disk herniates or ruptures when part of the center nucleus pushes the outer edge of the disk into the spinal canal and puts pressure on the nerves.
Low back pain affects an estimated four of five people, so pain alone isn't enough to recognize a herniated disk. The most common symptom of a herniated disk is sciatica, a sharp, shooting pain from the buttocks down the back of one leg. This is caused by pressure on the spinal nerve. Other symptoms include weakness in one leg, tingling or numbness in one leg or a burning pain in the back.
Most back pain will resolve itself with bed rest and over-the-counter pain relievers. You also can apply cold compresses or ice for no more than 20 minutes at a time, several times a day.
After any spasms settle, you can switch to gentle heat applications. Most important, consult your physician if the back pain is persistent.
Any physical activity should be slow and controlled so symptoms do not return. Take short walks and avoid sitting for long periods.
