One story about disc herniation surgery

What causes disc herniation in the lumbar region?
Lumbar disc herniation is closely related to the structure of the disc. The intervertebral disc consists of two parts - a dense circular ring that contains a thick gel-like core. The intravertebral discs are essential and important structures functioning as shock absorbers (provide cushioning between the vertebrae), they are integral for maintaining posture and permitting a wide degree of movement, they also provide support to the adjacent vertebrae of the spine
A disc hernia forms when the outer ring of the intervertebral disc ruptures and the core inside the disk ring protrudes through the rupture site outside the ring. Symptoms of intervertebral disc herniation present themselves when the nucleus of the disk protrudes in the vicinity of, or directly into an adjacent nerve. Complaints are therefore tied to the innervation region of the affected nerve (in the case of the lumbar spine - all nerves descend and innervate the legs. Sometimes the herniation happens in a direction that does not come in contact with any nerves, in such a case lumbar disc herniation can be completely asymptomatic.
Disc protrusion is an often finding on radiological examinations. Unlike in the case of a disc hernia, in the case of disc protrusion the structural integrity of the disc itself is preserved, it is instead deformed or dislocated. Small/insignificant disc protrusions are seen in almost every examination (magnetic resonance imaging or computed tomography), but they seldom cause symptoms. It is, however, possible for a disc protrusion to be large enough to depress an adjacent nerve and trigger the corresponding nerve impingement symptoms.