Each spinal disc has a jelly-like “ball bearing” core that is contained by bands of fibrous tissue. Healthy discs give you flexibility for normal turning and bending. Improper lifting, slips, falls and car accidents can cause the core to shift:
Herniation - disc wedging narrows nerve openings. Obvious symptoms may not be present.
Protrusion – like a blister, the disc bulges where it is the weakest, causing nerve pressure.
Prolapse – with the cushioning and separating compromised by rupture, movement is painful.