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Idiopathic Intracranial Hypertension

Medically reviewed by Last updated on Feb 4, 2024.

What is idiopathic intracranial hypertension (IIH)?

IIH is a condition that causes the pressure inside your skull to be higher than normal for no known reason. IIH can seem like a brain tumor, but no tumor is found. IIH is most common in obese women who are of childbearing age.

What causes IIH?

The cause may not be known. It may be caused by an increased amount of cerebrospinal fluid (CSF) in your skull. CSF is a clear fluid that surrounds the brain and spinal cord and protects them from injury. IIH may happen when your body makes too much CSF or does not absorb it correctly.

What increases my risk for IIH?

What are the signs and symptoms of IIH?

How is IIH diagnosed?

Your healthcare provider will ask about your health history and your symptoms. You may need any of the following tests:

How is IIH treated?

IIH may go away on its own. You may need any of the following if your symptoms continue or get worse:

Treatment options

The following list of medications are in some way related to or used in the treatment of this condition.

What can I do to manage IIH?

Call your local emergency number (911 in the US), or have someone call if:

When should I seek immediate care?

When should I call my doctor?

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.