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Living with Benign intracranial hypertension

A condition with high fluid pressure inside the skull that causes headaches and vision changes.

Understanding Benign intracranial hypertension

Benign intracranial hypertension, also called idiopathic intracranial hypertension (IIH) or pseudotumor cerebri, is a brain condition with high pressure inside the skull.

The name pseudotumor cerebri means "false brain tumor," because symptoms look like those of a brain tumor even though no tumor is present. It most often, but not always, occurs in young, overweight women. When an identifiable cause such as another disease or a medicine is found, it is called secondary IH.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Severe headache
  • Nausea and vomiting
  • Vision changes or blurred vision
  • Swelling of the optic nerve (papilledema)
  • Pulsing sounds inside the head
  • Stiff neck, eye pain, or memory problems

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include brain and nervous system specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    American Migraine Foundation and Bobby Jones Chiari & Syringomyelia Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists)
Expert care
Expert lists: American Migraine Foundation, Bobby Jones Chiari & Syringomyelia Foundation
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with American Migraine Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
How will you check the pressure inside my skull and my optic nerves?
How often should my vision be tested?
Could a medicine or another health problem be causing this?

Quick facts

Symptoms usually startAdult and as an Older Adult
InheritanceAutosomal Recessive

The exact cause is not known. It is likely due to high fluid pressure in the skull from a buildup or poor absorption of cerebrospinal fluid (CSF).

Neurological

Also known as: benign intracran. hypt.; bih - benign intracranial hypertension; idiopathic intracranial hypertension; iih; iih - idiopathic intracranial hypertension; noninfective serous meningitis

Patient organizations

Source: NIH GARD · Benign intracranial hypertensionGARD ID 4561 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Benign intracranial hypertension.

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Explore research for Benign intracranial hypertension

Explore actively recruiting Benign intracranial hypertension studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Benign intracranial hypertension with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
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  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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