What Is a Brain Aneurysm — And Why You Shouldn’t Ignore It

Quick Summary

• A brain aneurysm is a bulge in a weakened blood vessel in the brain.

• Many don’t cause symptoms and are discovered by accident.

• If an aneurysm ruptures, it can cause a sudden, severe headache and stroke.

• Risk factors include high blood pressure, smoking, and genetics.

• Early detection and healthy lifestyle habits can help prevent complications.

What Is a Brain Aneurysm?

A brain aneurysm happens when a weak spot in a blood vessel in your brain starts to balloon or bulge. This bulge can press on nerves or brain tissue and, if it bursts, it causes bleeding in the brain (called a hemorrhagic stroke).

Most aneurysms are small and don’t rupture. But if they do, it’s a medical emergency.

What Are the Symptoms?

Most unruptured brain aneurysms don’t show any signs. However, larger ones or those pressing on nearby tissue might cause:

• Pain above or behind one eye

• Blurred or double vision

• Numbness or weakness in the face

• Trouble speaking or concentrating

If an aneurysm ruptures, symptoms include:

• A sudden, severe headache (often described as the worst ever)

• Nausea or vomiting

• Stiff neck

• Loss of consciousness or confusion

Seek emergency help immediately if you experience these symptoms.

Who’s at Risk?

Anyone can develop a brain aneurysm, but certain factors raise the risk:

• High blood pressure

• Smoking or drug use

• Family history of aneurysms

• Older age

• Certain inherited conditions that affect blood vessels

• Chronic stress (may indirectly raise risk by increasing blood pressure)

How Are Brain Aneurysms Diagnosed?

Many aneurysms are found during brain imaging done for other reasons, like headaches or trauma. Common tests include:

• CT scan or MRI to get a clear image of the brain

• Cerebral angiogram to view blood flow in the brain’s arteries

If you have a family history or risk factors, your doctor may recommend screening.

Treatment Options

Treatment depends on the size, location, and risk of rupture.

• Watchful waiting: Small, low-risk aneurysms may just need regular monitoring.

• Surgical clipping: A metal clip is placed on the aneurysm to stop blood flow.

• Endovascular coiling: A less invasive procedure where coils are inserted to fill the aneurysm and prevent rupture.

• Lifestyle changes: Controlling blood pressure, quitting smoking, eating healthy, and managing stress can reduce risk.

Why Awareness Matters

Brain aneurysms often go unnoticed until they rupture. Being aware of the warning signs and risk factors could save your life — or someone else’s. If you suspect something’s wrong, don’t wait. Talk to your doctor, especially if you have a family history or experience unusual headaches or neurological symptoms.

FAQ

Q: What causes a brain aneurysm?
A: It's usually due to a weakness in the artery wall, which may be genetic or linked to conditions like high blood pressure.

Q: Can you live with an unruptured brain aneurysm?
A: Yes, many people live normal lives with small aneurysms that are carefully monitored.

Q: How can I lower my risk?
A: Maintain healthy blood pressure, don’t smoke, limit alcohol, and manage stress.

Q: Is a sudden headache always a sign of a rupture?
A: Not always, but a sudden, intense headache should never be ignored — get medical help right away.

Q: Can brain aneurysms be prevented?
A: Not all can be prevented, but healthy habits and early detection greatly reduce the risk of complications.