I would think there could be a link with T.N. and your IIH . The pressure would , could ... affect the Trig nerve I would think but I am not a Dcotor or professional.
As far as me... I got mine from accident and have knee back and neck issues but nothing that bad . my head injury from accident the worst of all the others. oh yeah like Catch .. BMW getting into menopause sota kinda. . .oh the joy .
have you been to our O.N. room here
http://neurotalk.psychcentral.com/forum105.html
it is for Occipital Neuralgia.. like t.n. pain optic nerve and eyes ears...
maybe check it out .
Healing hugs and low pain wishes
PEACE
BMW