Science today isn't the same as the science 2000 years ago was but some principles remain the same. The human knowledge constantly grows but with more knowledge there comes even more mysteries and unsolved questions, so science is always going forward.
Causes. The most common cause of a cervical herniated nucleus pulposus is gradual degeneration of the disc, attenuation (weakening) of the posterior annulus fibrosis, and subsequent protrusion of the nucleus pulposus into the spinal canal causing compression of the nerve root.
Hernias may be caused by coughing, obesity, heavy lifting, straining, fluid in the abdominal cavity, or chronic lung disease. Symptoms and signs include a lump or bulge, pain, and possible fever. Hernias are generally surgically repaired. Read the Hernia Main Article >>.