The neck consists of seven bones called vertebrae, separated by shock-absorbing discs. Each disc has a tough outer layer and a soft, gel-like center. The spinal cord runs through these vertebrae, and at each level, nerve roots branch out to supply sensation and movement to the head, neck, shoulders, and arms.

When the tough outer layer of a disc tears, the soft inner gel can bulge out, pressing on nearby nerve roots. This condition is often called a slipped disc, though terms like herniated, prolapsed, or ruptured disc are also used. The name "slipped disc" can be misleading because the disc itself does not actually slip out of place — it’s the inner material that protrudes.

Physiotherapy is a highly effective treatment for a slipped disc in the neck, helping to reduce pain and restore function.