Common myths about brain aneurysms—and the facts you should know

While several prominent figures in popular culture have tried to bring awareness to brain aneurysms in recent years, there are still many myths and misunderstandings associated with the condition.

So, what is a brain aneurysm?

Occurring when blood vessels form balloon-like bulges in weak artery walls of the brain, a brain aneurysm often develops quietly, potentially rupturing and becoming a medical emergency.

Below, Dr. Christopher Baker, an interventional radiologist at Hoag’s Pickup Family Neurosciences Institute, explains the facts behind some of the most common myths about brain aneurysms—so that you can understand risk, recognize symptoms and know when to seek medical attention.

Myth #1: Brain aneurysms always cause symptoms

Fact: Many brain aneurysms don’t cause any symptoms.

“Most unruptured aneurysms are ‘silent’ and often discovered incidentally during imaging for another condition,” Dr. Baker says. “Symptoms typically occur only if an aneurysm grows large, presses on nearby nerves, or ruptures.”

In these cases, symptoms may include:

• Headaches

• Vision changes or blurred vision

• Pain above or behind the eye

• Numbness or weakness on one side of the face

• Difficulty speaking or concentrating

Myth #2: A brain aneurysm always leads to rupture

Fact: Many brain aneurysms never rupture

While a ruptured aneurysm is a medical emergency, many people live their entire lives with an unruptured aneurysm that never causes problems. Physicians carefully assess size, location, and risk factors to determine whether monitoring or treatment is needed. That said, symptoms associated with a ruptured aneurysm are:

• A sudden, severe headache often described as “the worst headache of my life”

• Nausea or vomiting

• Stiff neck

• Sensitivity to light

• Seizures

• Loss of consciousness

• Sudden confusion or trouble speaking

Myth #3: Only older adults get brain aneurysms

Fact: Brain aneurysms can affect adults of all ages.

Although aneurysms are more common in adults over 40, they can occur in younger adults as well. Certain genetic conditions and family history can increase risk regardless of age.

Myth #4: Headaches usually mean you have a brain aneurysm

Fact: Most headaches are not caused by brain aneurysms.

“Tension headaches, migraines, and sinus headaches are far more common,” says Dr. Baker. “However, a sudden, severe ‘worst headache of your life’ can be a sign of a ruptured aneurysm and requires immediate emergency care.” Myth #5: Brain aneurysms are always inherited

Fact: Most aneurysms are not directly inherited.

While having a family history of brain aneurysms can increase risk, most people diagnosed with an aneurysm do not have a known genetic cause. And while some aneurysms are present at birth, most develop gradually over time. Lifestyle factors known to increase risk include:

• Smoking

• High blood pressure, which puts extra stress on blood vessel walls

• Drug use

Myth #6: If an aneurysm hasn’t ruptured, it doesn’t need medical attention

Fact: Even unruptured aneurysms should be evaluated by a specialist.

Some aneurysms require monitoring over time, while others may benefit from preventive treatment. Regular follow-up and personalized care help reduce the risk of complications.

Myth #7: Treatment for brain aneurysms always involves open brain surgery

Fact: Many aneurysms can be treated with minimally invasive procedures.

Advances in endovascular techniques allow many patients to be treated through blood vessels using catheters, coils, or stents—often with shorter recovery times and less risk than traditional surgery.

Myth #8: A ruptured aneurysm is always fatal

Fact: Many people survive a ruptured brain aneurysm, but prompt care is key.

“Outcomes have improved significantly thanks to advances in emergency response, imaging, surgical techniques, and rehabilitation,” says Dr. Baker. “Early treatment and expert care are critical to survival and recovery.”

Knowledge Is Power

Understanding the realities of brain aneurysms can encourage timely care and help patients make informed decisions about their health. If you have risk factors, a family history, or concerning symptoms, talking with a physician can provide clarity and peace of mind.

Learn more about Hoag’s Pickup Family Neurosciences Institute.