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What Are the Signs and Symptoms of an Intracranial Aneurysm? The signs and symptoms of an aneurysm depend on its type, location, and whether it has ruptured or is interfering with other structures in the body. Aneurysms can develop and grow for years without causing any signs or symptoms. It is often not until an aneurysm ruptures or grows large enough to press on nearby parts of the body or block blood flow that it produces any signs or symptoms.

Cerebral Aneurysm

If a cerebral (brain) aneurysm presses on nerves in your brain, it can cause signs and symptoms. These can include:

•  A droopy eyelid
•  Double vision or other changes in vision
•  Pain above or behind the eye
•  A dilated pupil
•  Numbness or weakness on one side of the face or body
•  If a cerebral aneurysm ruptures, symptoms can include a sudden, severe headache, nausea and vomiting, stiff neck, loss of consciousness, and signs of a stroke. Signs of a stroke are similar to those listed above for cerebral aneurysm, but they usually come on suddenly and are more severe. Any of these symptoms require immediate medical attention.

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