A brain aneurysm is often described as a “silent” condition because many people have one without experiencing any symptoms. However, if an aneurysm leaks or ruptures, it becomes a medical emergency that requires immediate treatment. Recognizing the warning signs and seeking prompt medical attention can make a significant difference in outcomes.
While not every headache or neurological symptom is caused by an aneurysm, certain symptoms—especially when sudden or severe—should never be ignored.
Important: This article is intended for educational purposes only and is not a substitute for professional medical advice. If you suspect a brain aneurysm or stroke, call your local emergency services immediately.
What Is a Brain Aneurysm?
A brain aneurysm is a weakened area in the wall of a blood vessel in the brain that bulges outward as it fills with blood. Many aneurysms remain small and never rupture. However, if an aneurysm leaks or bursts, it causes bleeding around the brain (a hemorrhagic stroke), which can be life-threatening.
Symptoms generally fall into two categories:
- Unruptured aneurysm: Often causes no symptoms but may produce mild symptoms if it presses on nearby nerves or brain tissue.
- Ruptured aneurysm: Usually causes sudden, severe symptoms that require emergency medical care.
Possible Signs of an Unruptured Brain Aneurysm
1. Persistent Localized Headache
A headache that consistently occurs in one specific area—particularly behind or above one eye—and differs from your usual headaches may warrant medical evaluation.
2. Vision Changes
An enlarging aneurysm may press on nerves that control vision, potentially causing:
- Blurred vision
- Double vision
- A dilated pupil
- A drooping eyelid
- Reduced peripheral vision
3. Pain Around or Behind the Eye
A persistent ache around one eye that does not improve may occur if nearby nerves are affected.
4. Facial Numbness or Weakness
Pressure on certain nerves may lead to numbness, tingling, or weakness affecting one side of the face.
5. Difficulty Speaking
Some people may notice slurred speech or difficulty finding words, although these symptoms can have many different causes.
6. Seizures
In uncommon cases, an unruptured aneurysm may trigger seizure activity.
The symptoms above may develop gradually, but if an aneurysm ruptures, the warning signs become far more dramatic and require immediate emergency care.
