Idiopathic Intracranial Hypertension (formerly called Pseudotumor Cerebri) is a condition where the body doesn't absorb cerebrospinal fluid properly or produces too much of it. That is a really short version of this condition.
Seizures are not typically part of this disorder, but that doesn't mean it couldn't happen and you should always discuss questions and concerns with your doctor.
Here is information on IIH:
Pseudotumor Cerebri (IIH) - The Basics