Brain aneurysm: why recognizing the signs in time matters

The word "aneurysm" is frightening, but having one does not mean it will rupture. Knowing the warning signs and risk factors is what lets you act in time.

What is a brain aneurysm?

It is a bulge in the wall of an artery in the brain: the wall weakens and widens like a small balloon. Most are small and cause no symptoms, and many people live without knowing they have one. The risk appears when it grows or ruptures.

Do all aneurysms rupture?

No. Many stay stable for life and are found by chance on imaging done for another reason. When one ruptures, it causes bleeding in or around the brain, which is a medical emergency.

What symptoms does an unruptured aneurysm cause?

It almost never causes symptoms. If it is large, it can press on nearby structures and cause a persistent headache, double vision or other vision changes, pain behind one eye or a drooping eyelid. These symptoms are not always due to an aneurysm, but if they are new or unexplained they deserve an evaluation.

What are the symptoms of a ruptured aneurysm?

The typical symptom is a sudden, extremely intense headache, which many people describe as the worst of their life. It may come with:

• A stiff neck, nausea or vomiting.
• Sensitivity to light or blurred vision.
• Loss of consciousness.
• Trouble speaking or moving.

With these signs, go to the emergency room immediately: every minute counts.

What increases the risk of an aneurysm?

High blood pressure, smoking, having relatives with aneurysms, some diseases that weaken the vessel walls and the use of substances that sharply raise blood pressure. Controlling blood pressure and quitting smoking are the most important preventive measures.

What happens if an unruptured aneurysm is found?

It depends on its size, shape and location, and on each patient's characteristics. In some cases periodic monitoring with imaging is enough; in others, treatment is recommended to reduce the risk of rupture. The decision is made individually with the specialist.

In summary

An aneurysm found by chance deserves a calm, well-informed evaluation. A sudden, unusual headache is an emergency that should not wait.

This article is for information only and does not replace a medical visit. If you have warning signs, go to the emergency room.