A slipped disc is a medical condition in which intervertebral discs have been pushed out of position between the vertebrae. The disc material often protrudes from the back of the spine, pressing against a nerve root and causing sciatica-like pain to radiate down one or both legs.

It can also cause a numbness, tingling, and weakness in the feet and toes. A slipped disc most commonly occurs in people who spend long periods of time on their feet or who engage in heavy lifting at work.