An aneurysm is a weakened area in the wall of a blood vessel that bulges outward. Many aneurysms cause no symptoms until they become large, leak, or rupture, which is why knowing the warning signs matters.
🚨 Signs that need urgent attention
1. Sudden, extremely severe headache
A sudden “worst headache of my life,” especially one that reaches maximum intensity within seconds or minutes, can be a sign of a ruptured brain aneurysm.
2. Sudden weakness or numbness
Weakness or numbness—particularly on one side of the body—can indicate bleeding or another serious brain problem.
3. Trouble speaking or understanding
Sudden confusion, difficulty speaking, or difficulty understanding others requires emergency evaluation.
4. Vision changes
Sudden double vision, loss of vision, or other abrupt changes in eyesight can occur with some brain aneurysms.
5. Severe neck stiffness with headache
A ruptured brain aneurysm can cause bleeding around the brain, sometimes producing a severe headache accompanied by a stiff or painful neck.
6. Loss of consciousness or seizure
Fainting, seizures, or a sudden decline in alertness are emergency symptoms.
7. Sudden severe chest, back, or abdominal pain
Aneurysms can also occur in the aorta or other arteries. A sudden, intense pain in the chest, back, or abdomen—especially if accompanied by weakness, sweating, or fainting—can indicate a dangerous complication.
What about an aneurysm that hasn’t ruptured?
Some aneurysms may cause symptoms because they press on nearby structures. Depending on their location, these can include persistent localized pain, vision problems, or other neurological symptoms. However, symptoms alone cannot confirm an aneurysm; imaging tests are usually needed.
When to seek emergency help
If someone develops a sudden explosive headache, sudden neurological symptoms, loss of consciousness, seizure, or sudden severe chest/back/abdominal pain, don’t wait for the symptoms to improve. Seek emergency medical care immediately.
Important: Most headaches or aches are not caused by aneurysms. But the sudden-onset symptoms above are important because an aneurysm rupture can be life-threatening.