.com says in the page that Sara linked to, pseudotumor is more commonly (or at least accurately) referred to as Idiopathic Intracranial Hypotension (IIH). It's a diagnosis that's typically made from imaging tests and/or lumbar puncture.
It's called idiopathic because the cause of the intracranial pressure increase is often unknown or difficult to figure out. But there are a lot of known causes that your doctor will most likely be testing you for, probably in order of the likelihood and seriousness of the potential underlying condition. Though it does depend on the cause, in general it is a manageable condition. The biggest concern is usually preventing vision problems from developing. In a significant majority of these cases no long-term vision impairment occurs.
Anyhow, again, the treatment for IIH varies a great deal depending on the suspected (or confirmed) cause. I wish you the best of luck--I'm sure it'll work out!
DX: NDPH, Recovered(?) CRPS
RX: Lamictal, Namenda, Wellbutrin XL, Oxycodone, Oxycontin, Concerta (Methylphenidate), Clonazepam, Rozerem, Magnesium (1200 mg/d), Riboflavin (400 mg/d).
PRN: Ketamine nasal spray
, Toradol IM, Celebrex, Haloperidol, Lodine, Zofran, Phenergan, Ambien CR
rarely: Migranal, Thorazine, DHE IM, Droperidol IM, Reglan, Provigil, triptans (Imitrex, Maxalt, Relpax, Zomig, Axert, Amerge)I can be contacted personally via email at korbnep:firstname.lastname@example.org.