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Cerebral aneurysm triggers include eight everyday activities (PICTURES)

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Cerebral aneurysms can be deadly if they rupture

(CBS) Can blowing your nose be deadly? It can if you have an aneurysm in your brain, a.k.a. a cerebral aneurysm. And nose-blowing is just one of eight everyday activities that can trigger a cerebral aneurysm to burst, according to new research published in the May 5 issue of the journal Stroke.

PICTURES - Brain bleed: 8 things that rupture aneurysms

Just what is an aneurysm? It's a weakened portion of a blood vessel. Aneurysms can occur in various places throughout the body, but cerebral aneurysms are especially dangerous. If they burst and bleed - an event known as a subarachnoid hemorrhage - they can be deadly.

How deadly? The Brain Aneurysm Foundation estimates that of 40 percent of the 27,000 Americans who suffer a ruptured cerebral aneurysm die outright. Most of those who survive are left with permanent brain damage.

That's scary stuff, especially if you have an aneurysm or a family history aneurysm - or if you're experiencing pain behind the eye or other symptoms of cerebral aneurysm. But for the general population, experts say there's little reason to worry.

Even if you blow your nose.