Idiopathic Intracranial Hypertension, also known as Pseudotumor Cerebri, is a neurological disorder related to high pressures in the fluid around the brain and spinal cord. This fluid is called Cerebrospinal Fluid (CSF). If there is a buildup of CSF (caused by an overproduction or not enough being re-absorbed) this results in elevated pressures within the skull. Ultimately causing symptoms similar to a brain tumor. Papilledema is a condition in which increased pressure in or around the brain causes the part of the optic nerve inside the eye to swell. If left untreated it can lead to visual disturbances and blindness.