Brain Aneurysms: Risk Factors, Warning Signs, & Prevention

A brain aneurysm is a small, weak spot in the wall of a blood vessel in the brain that slowly balloons outward, like a thin bubble forming on the side of a garden hose. Most never rupture. But some do, and when they do, the consequences can be devastating and fast. Right now, roughly one in 50 people in the United States is carrying a brain aneurysm without any idea it's there. No pain, no warning, no symptoms of any kind. 

While this information may seem frightening, it is meant to give you the kind of clear, honest information that helps you make confident decisions about your brain health. Read on to learn who faces the greatest risk of developing a brain aneurysm, which warning signs you should pay attention to, steps you can take to lower your risks, and where to find the best brain aneurysm treatment in Thousand Oaks.

What is a Brain Aneurysm? 

A brain aneurysm starts with a weak spot in the wall of an artery, deep inside the brain, where blood vessels branch off in different directions. When that happens, blood pressure pushes against the weakened area and causes it to bulge outward, causing a small, balloon-like pocket of blood to form where it should not be. 

Most aneurysms form along the major arteries at the base of the skull, right where the blood vessels divide, and the walls are under the most stress. Additionally, many aneurysms never cause a single symptom and are found only by accident during a brain scan ordered for an entirely different reason. 

There are a few different types of brain aneurysms:

• Saccular aneurysms: Also called berry aneurysms, are the most common type of aneurysm and form most often at the point where blood vessels branch
• Fusiform aneurysms: These aneurysms cause a wider, spindle-shaped bulge along the entire vessel wall and tend to be linked more to blood vessel disease rather than to a single weak point
• Mycotic aneurysms: This rare type of brain aneurysm forms as a result of infection

The type, size, and location of an aneurysm all matter when the best neurovascular surgeon in Thousand Oaks is deciding on the most appropriate course of treatment. 

Understanding Brain Aneurysm Risk Factors

Certain people carry a higher chance of developing brain aneurysms, and knowing where you stand can be useful for prevention and early detection: 

• Women tend to develop brain aneurysms more often than men, and women over the age of 55 face an even higher risk of aneurysm rupture. Those between the ages of 40 and 60 carry a 50 percent higher risk of developing an aneurysm than other age groups. 
• Family history is another factor that doctors take seriously. If two or more close relatives, such as a parent, sibling, or child, have had a brain aneurysm, physicians often recommend proactive screening, because the risk in those cases is meaningfully higher than in the general population. 
• High blood pressure and smoking are two of the strongest risk factors because both put constant stress on blood vessel walls over time. 
• Heavy alcohol use, certain connective tissue disorders, and conditions like polycystic kidney disease also raise your risk of developing a brain aneurysm. 

Remember, risk factors only suggest that a conversation with the best neurovascular surgeon in Thousand Oaks is worth having, not because something is necessarily wrong. 

Brain Aneurysm Warning Signs

Most unruptured aneurysms don’t cause any symptoms. There is no headache, no pressure, no sensation that anything unusual is happening. In fact, smaller aneurysms that are not growing rarely produce any symptoms at all. But when an aneurysm becomes large enough to press on nearby brain tissue or nerves, you can develop symptoms that are easy to dismiss. A growing aneurysm may cause symptoms that can easily be mistaken for migraines, fatigue, or stress, such as: 

• Headaches
• Vision changes
• A drooping eyelid
• Numbness on one side of the face
• A dull pressure behind one eye

In some cases, a leaking aneurysm produces what doctors call a sentinel headache, which is a warning headache that appears days or even weeks before a major rupture. Only a small number of people experience this, which makes it easy to overlook. 

When to Seek Emergency Care for Brain Aneurysm Symptoms

If an aneurysm ruptures, the defining symptom is a sudden, severe headache that comes on in seconds. Usually, this headache is something patients and medical professionals consistently describe as the worst headache of their lives. Some even describe it as a crack or an explosion inside the head, sometimes accompanied by nausea, vomiting, a stiff neck, sensitivity to light, or a sudden loss of consciousness. This is called a thunderclap headache, and it is a medical emergency. Other symptoms of a rupture can include: 

• Signs of stroke, including sudden numbness or weakness in the face, arm, or leg, slurred speech, trouble understanding words, or a sudden loss of vision in one or both eyes
• Loss of consciousness
• Sudden confusion 

Any of these symptoms requires calling 911 immediately. Time is the most critical factor after a brain aneurysm ruptures. CT scans can detect bleeding with 100% accuracy within the first six hours of symptom onset, but that accuracy drops to 92% within 24 hours and falls to 58% by day five. 

If you or someone near you experiences a sudden, severe headache unlike anything before it, do not drive to the hospital. Call 911. The difference between acting in minutes and waiting an hour can change every outcome that follows.

Can a Brain Aneurysm Be Prevented? 

Prevention is not a guarantee. But there are steps that can lower your risk of developing a brain aneurysm:

• Stop smoking: This is the most direct place to start. It is one of the most significant risk factors for both aneurysm growth and rupture. 
• Controlling high blood pressure: Having hypertension is another major contributor to brain aneurysms, and keeping it well-managed through diet, exercise, medication, or a combination of all three reduces the chronic stress placed on vessel walls. Factors like poor diet, lack of sleep, and ongoing stress can gradually increase risk over time, which means that small, steady lifestyle changes are important. 
• Get a screening: Screening options exist for people who have a family history or considerable risk factors and want to know where they stand. These high-risk individuals can be evaluated through MRI, CT angiography, or conventional angiography, which are non-invasive imaging tools that can detect an aneurysm before it ever causes a problem. 

What to Expect from a Neurovascular Specialist

Treatment options for a brain aneurysm include a range from careful monitoring with regular imaging scans, to minimally invasive endovascular coiling, and surgically placed stents. Getting the right treatment depends on the size, shape, and location of the aneurysm as well as overall health. It’s also important to know that not every aneurysm requires immediate intervention. Smaller aneurysms located in lower-risk areas of the brain are often monitored over time rather than treated right away. 

What makes the difference in these decisions is the experience of the specialist reading that imaging and guiding the plan. Neurovascular care is a distinct specialty, and working with physicians who focus specifically on conditions of the brain's blood vessels means the full picture gets considered from the start. 

Finding the Best Brain Aneurysm Treatment in Thousand Oaks

The specialists at Vascular and Neuroscience Institute bring a high level of focused expertise to every patient they see, whether someone comes in for a second opinion, a routine screening, or a newly discovered aneurysm that needs a clear path forward. You deserve care from people who know this condition deeply. That is exactly what VNI is here to provide.

At our state-of-the-art clinics in Thousand Oaks, Santa Barbara, West Hills, Lancaster, and Las Vegas, our team of expert neurovascular specialists works specifically in the diagnosis, monitoring, and treatment of conditions like brain aneurysms. We also offer focused, specialized care built around the brain's blood vessels and what can go wrong inside them.

Ready to get accurate, effective care with the best brain aneurysm treatment in Thousand Oaks?