Iiopathic intracranial hypertension (IIH), sometimes called benign intracranial hypertension (BIH) or pseudotumor cerebri (PTC) is a neurological disorder that is characterized by increased intracranial pressure (ICP), in the absence of a tumor or other diseases affecting the brain or its lining. The main symptoms are headache and visual problems. Diagnosis requires brain scans and lumbar puncture. There are various medical and surgical treatments.