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Brain aneurysm

Causes

Brain aneurysms are caused by a weakness in the walls of blood vessels in the brain. There are several reasons why this may happen, although an exact cause isn't always clear.

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Brain aneurysms are usually treated with surgery if they have burst or there's a risk they will burst.

It's not clear what causes brain aneurysms. You're more likely to get them if you smoke, have high blood pressure or have family members with them.

A brain aneurysm is a bulge in a blood vessel in your brain. It can be very serious if it bursts.

Symptoms of a brain aneurysm can include headaches or changes in your vision. If it bursts, it can cause a sudden and very severe headache.

Page last reviewed: 16/08/2018
Next review due: 16/08/2021