I'd never heard of this before. I had read that it is possible for infection from the face and upper jaw to track to the the brain, so maybe there is some venou

I'd never heard of this before. I had read that it is possible for infection from the face and upper jaw to track to the the brain, so maybe there is some venous return from the face via the brain. https://en.wikipedia.org/wiki/Danger_triangle_of_the_face https://en.wikipedia.org/wiki/Danger_triangle_of_the_face