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.
Causes of Petechiae. Petechiae is a sign of a disease related to low platelet count (thrombocytopenia). It can also occur if extreme pressure is applied to the tissues such as in excessive vomiting, tourniquet application or in too much coughing. Petechiae can occur among the children and the most common cause for them is viral infection.