Pseudotumor Cerebri Support Group
Pseudotumor cerebri (PTC) is a neurological disorder that is characterized by increased intracranial pressure, in the absence of a tumor or other diseases affecting the brain or its lining. Diagnosis requires brain scans and lumbar puncture. Characteristic symptoms are headache, transient visual obscurations or transient visual loss in one or both eyes usually lasting...
http://www.dartmouth.edu/~dons/part_1/chapter_5.html
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2848459/
(this article goes over the symptoms and treatment. It has a blurb that can be misunderstood - it doesn't say people with Trigeminal neuralgia are crazy, just that some doctors erroneously think they are, and it also pops up disproportionately in a certain population.)
There are lots of other articles - just google.