Brain aneurysm
A brain aneurysm rarely causes any symptoms unless it bursts (ruptures).
Unruptured brain aneurysms occasionally cause symptoms if they're particularly large orpress against tissues or nerves inside the brain.
Symptoms of an unruptured brain aneurysmcan include:
You should see your GP as soon as possible if you experience symptoms of an unruptured brain aneurysm. Although most aneurysms won't rupture, it's important to get it checked in case treatment is necessary.
Symptoms of a ruptured brain aneurysm usually begin with a sudden agonising headache. It's been likened to being hit on the head, resulting in a blinding pain unlike anything experienced before.
Other symptoms of a ruptured brain aneurysm also tend to come on suddenly and may include:
A ruptured brain aneurysm is a medical emergency. Call 999 immediately and ask for an ambulance if someone is experiencing symptoms of a ruptured brain aneurysm.
Find out what a brain aneurysm is, including why they develop, who's affected, how they're treated and how to prevent them.
A brain aneurysm rarely causes any symptoms unless it bursts (ruptures).
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.
A brain aneurysm is usually diagnosed using a magnetic resonance imaging (MRI) scan or a computerised tomography (CT) scan.
Brain aneurysms can be treated using surgery if they've burst (ruptured) or there's a risk they will.
You can't always prevent brain aneurysms, but you can lower your risk by not smoking and reducing high blood pressure.