Would idiopathic intercranial hypertension usually cause headaches? how often? how severe? etc

Yes: The correct term is intra-cranial, meaning inside or within the cranium, headaches are often the result of this condition and can be severe as well as frequent. A good neurologist can give you more information after an examination and imaging studies. Also, be aware that an imaging study of the head is mandatory prior to a spinal tap in patients with this condition.

Yes: Idiopathic intracranial hypertension, often referred to as pseudotumor cerebri, usually presents with severe headaches. These can be frequent and constant. Work-up includes an MRI scan of the brain (to rule out a mass lesion) and spinal taps to document the increased pressure. There are medications that may help as well as surgical procedures that may help with the symptoms.