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Symptoms
By Mayo Clinic staff
Ruptured aneurysm
A sudden, severe headache is the key symptom of a ruptured aneurysm. This headache is often described as the "worst headache" ever experienced. Common signs and symptoms of a ruptured aneurysm include:
- Sudden, extremely severe headache
- Nausea and vomiting
- Stiff neck
- Blurred or double vision
- Sensitivity to light
- Seizure
- A drooping eyelid
- Loss of consciousness
- Confusion
'Leaking' aneurysm
In some cases, an aneurysm may leak a slight amount of blood. This leaking (sentinel bleed) may cause only a:
- Sudden, extremely severe headache
A more severe rupture almost always follows leaking.
Unruptured aneurysm
An unruptured brain aneurysm may produce no symptoms, particularly if it's small. However, a large unruptured aneurysm may press on brain tissues and nerves, possibly causing:
- Pain above and behind an eye
- A dilated pupil
- Change in vision or double vision
- Numbness, weakness or paralysis of one side of the face
- A drooping eyelid
When to see a doctor
A ruptured aneurysm is a medical emergency. In about 30 percent of cases, ruptured brain aneurysms are fatal.
Seek immediate medical attention if you develop a:
- Sudden, extremely severe headache
If you're with someone who complains of a sudden, severe headache or who loses consciousness or has a seizure, call 911 or your local emergency number.
- Cerebral aneurysm fact sheet. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/cerebral_aneurysm/detail_cerebral_aneurysm.htm. Accessed Feb. 28, 2011.
- Singer RJ, et al. Treatment of aneurysmal subarachnoid hemorrhage. http://www.uptodate.com/home/index.html. Accessed Feb. 18, 2011.
- Cerebral aneurysm. American Association of Neurological Surgeons. http://www.aans.org/Patient%20Information/Conditions%20and%20Treatments/Cerebral%20Aneurysm.aspx. Accessed Feb. 28, 2011.
- Singer RJ, et al. Unruptured intracranial aneurysms. http://www.uptodate.com/home/index.html. Accessed Feb. 18, 2011.
- Westerlaan HE, et al. Intracranial aneurysms in patients with subarachnoid hemorrhage: CT angiography as a primary examination tool for diagnosis - a systematic review and meta-analysis. Radiology. 2011;258:134.
- Naggara ON, et al. Endovascular treatment of intracranial unruptured aneurysms: Systematic review and meta-analysis of the literature on safety and efficacy. Radiology. 2010;256:887.
- Hacein-Bey L, et al. Current imaging assessment and treatment of intracranial aneurysms. American Journal of Roentgenology. 2011;196:32.
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