This unnatural curving of the spine is a deformation caused by disease or damage to the vertebrae.
(also referred to as herniated nucleus pulposus (HNP), disc rupture, or disc prolapse)
A herniated disc occurs when the outer wall of the disc is torn and a portion of the disc is now pushed out through this outer wall tear. The term “annular tear” comes from the tear only without herniation and the term “herniated disc” arrives when the center nucleus is herniated out through the tear in the wall. This phenomenon will cause pain in two ways. The nucleus will produce a chemical and the irritant response on the nerves. Back pain is also produced by the tear in the annular wall.