What is a brain aneurysm?
A brain aneurysm is like a blister, bubble or pocket that occurs in the wall of one of the brain's blood vessels. When a vessel walls gets weak, it can start to stretch out and make a bubble. Eventually, that bubble can rupture and cause bleeding—called a hemorrhage—in the brain.
Symptoms of a brain aneurysm
A tricky aspect of a brain aneurysm is that it often doesn't cause any symptoms unless it ruptures or gets big enough to push against a nerve. You may not know it's there unless it's found during another test, like an MRI. If an aneurysm gets large enough to press on a nerve, you may notice symptoms like:
- One dilated pupil
- Numbness on one side of the body
- Pain above one eye
- A drooping eyelid on one side
Other problems can look or feel the same way, but if you have these symptoms, talk to your doctor. Catching an aneurysm before it ruptures can make a big difference. When an aneurysm is about to rupture, common symptoms include:
- The worst headache you've ever had
- Weakness or numbness
- Loss of consciousness
A ruptured aneurysm is an emergency. Get medical attention immediately for anyone experiencing these symptoms.