Signs and Symptoms

Signs and Symptoms

Whether or not you are at risk for brain aneurysm, it is wise to know the signs and symptoms.

At first, you may not know you have a brain aneurysm because it may be present for a long time without causing any symptoms. It may be discovered only when you have testing or imaging for some other condition. That is why it is important for you to talk with your doctor about early detection if you are at risk for aneurysm.

Signs and symptoms that an aneurysm is growing

An aneurysm that is growing, but hasn’t burst, may cause pressure on nerves or tissue in the brain. This pressure may cause:

  • Headache or neck pain
  • Fuzzy or double vision, or loss of vision
  • Numbness in the face
  • Enlarged pupil size
  • Drooping eye lid
  • Severe drowsiness

Signs and symptoms that an aneurysm has burst

An aneurysm that has burst or ruptured allows blood to flow into the space surrounding the brain (subarachnoid space) or directly into the brain. The symptoms of a ruptured aneurysm come on suddenly. You may experience:

  • A sudden, severe headache (many people describe this type of headache as “the worst headache of my life”)
  • Severe stiff neck
  • Nausea and vomiting
  • Double vision
  • Mental confusion
  • Dizziness and fainting
  • Losing consciousness

If you – or a friend or relative – experience any of these symptoms, call 911 immediately.

Learn more about brain aneurysm

Contact Information

Swedish Cerebrovascular Center
550 17th Avenue
Suite 110
Seattle, WA 98122
Phone: 206-320-3470
Fax: 206-320-3471
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Newly Diagnosed?

Find out more about brain aneurysm treatment options, hear from a board certified surgeon and watch a video from a patient's perspective.

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Video Library

Patient Education: Brain Aneurysms


What Is a Cerebral Aneurysm?

What Causes Cerebral Aneurysms?

Warning Signs and Symptoms of Aneurysms

What Are Aneurysm Treatments?

What Is Aneurysm Clipping?

What Is Aneurysm Coiling?

The Advantages of Choosing Swedish to Treat Aneurysms

CME Video Library

How you can help

Swedish is constantly working to ensure patients with debilitating neurological disorders have access to the best treatment options, the latest technology, and state-of-the-art facilities.

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Support for Cerebrovascular Patients

Have a question about brain aneurysm services at Swedish?
Want to be part of our Cerebrovascular Support Group? 

Email us or call the CerebrovascularSupport Line: 206-320-4985