A herniated disk refers to a drag with one among the rubbery cushions (disks) that sit between the individual bones (vertebrae) that stack to form your spine. A spinal disk features a soft, jellylike center (nucleus) encased during a tougher, rubbery exterior (annulus). Sometimes called a slipped disk or a ruptured disk, a herniated disk occurs when a number of the nucleus pushes out through a tear within the annulus. A herniated disk, which may occur in any a part of the spine, can irritate a close-by nerve. Depending on where the herniated disk is, it may result in pain, numbness, or weakness in an arm or leg. Many people have no symptoms of a herniated disk. Surgery is usually not necessary to relieve the problem.