Because I irritate myself by not publishing this sooner BUT..

This is the mechanism as to why the pains experienced during appendicitis occurs...

Autonomic sensory neurones travel with sympathetic nerves in bowel and the visceral peritoneum. So the appendix receives its sympathetic nerve supply via the least splanchnic nerve which originates from sympathetic chain at T10 and T11. The sensation (pain) is interpreted as irritation occurring at the skin distribution of the spinal nerves of the spinal cord level (dermatome). In this case, T10 is the periumbilical region, thus pain is thought to be originating from the areas supplied by the somatic nerves entering the spinal cord at the same level as the nerves from the pain producing organ.
The pain may be described as dull in nature as it originates from the visceral peritoneum.

Continuous inflammation can cause the overlying parietal peritoneum to be irritated, thus causing a sharp pain. It is also more localised as the nerves involved are now somatic nerves.


Heh. Well, I'm not sure if I've explained this rightly/clearly haha.