Also, many of the cranial nerves go thru the cavernous sinuses
in the skull...these also carry blood vessels. This can get very complex, and I don't know all the details, about it.
But infections can penetrate to these cavities (they are not the same as the sinuses we are more familiar with). The infections can arise on the face where certain areas drain in that direction.
(often called the "triangle of death")
http://en.wikipedia.org/wiki/Cranial_nerves
http://en.wikipedia.org/wiki/Cavernous_sinus
There was a very serious Mystery Diagnosis involving this special sinus area... involving the eye.
__________________
All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
************************************
.
Weezie looking at petunias 8.25.2017
****************************
These forums are for mutual support and information sharing only. The forums are not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider. Always consult your doctor before trying anything you read here.