As a specialist in diagnosing and treating brain aneurysms and stroke, I often encounter patients ask how to differentiate between the symptoms of a brain aneurysm and a stroke. While both are serious conditions affecting the brain, they present in distinct ways. A brain aneurysm may cause a sudden, severe headache - often described as the worst headache of one’s life - along with vision changes, nausea, or a stiff neck. On the other hand, stroke symptoms often include sudden weakness or numbness on one side of the body, slurred speech, confusion, or difficulty walking. Understanding these differences can be life-saving.
Brain Aneurysm vs. Stroke Symptoms Overview
Suffering from an intense headache is not only painful, but it can also be dangerous. Either a brain aneurysm or a stroke could be the cause. And either could be fatal. As such there can be confusion or overlap between the two. Simply put, a brain aneurysm is a form of stroke and ruptured brain aneurysm is one of the causes of stroke, although less common. It serves as one of the reasons for getting a stroke.
In 2023, it was estimated three out of 100 Singapore residents could have a brain aneurysm. Most are unaware of the possibility. Strokes are the leading cause of disability in Singapore's adult population. Cerebrovascular diseases such as strokes and brain aneurysms that rupture account for more than five percent of deaths here each year. Because neurological symptoms may overlap between different conditions, some patients also wonder whether they would necessarily recognise the signs of a brain aneurysm.
Common Questions About Brain Aneurysm vs Stroke Symptoms
What is the difference between a brain aneurysm and a stroke?
A brain aneurysm and a stroke are related but different conditions.
A brain aneurysm occurs when a weakened area of a brain artery wall forms a bulge. If the aneurysm ruptures, it can cause bleeding around the brain, known as a subarachnoid haemorrhage, which is a type of haemorrhagic stroke.
A stroke occurs when blood flow to part of the brain is interrupted or when bleeding occurs within the brain. Strokes are generally divided into:
- Ischaemic stroke – caused by a blocked blood vessel preventing blood supply to the brain
- Haemorrhagic stroke – caused by bleeding from a damaged blood vessel
Understanding the difference helps patients recognise warning signs and seek appropriate medical care quickly.
Can a brain aneurysm cause stroke symptoms?
Yes. A brain aneurysm can cause stroke-like symptoms, particularly if it ruptures or affects blood flow in the brain.
Possible symptoms include:
- Sudden weakness or numbness on one side of the body
- Difficulty speaking or understanding speech
- Facial drooping
- Vision changes
- Loss of coordination or balance
- Confusion
- Seizures
- Loss of consciousness
A ruptured brain aneurysm may also cause a sudden, severe headache often described as a “thunderclap headache”
What are the warning signs of a stroke?
Common stroke warning signs can be remembered using the FAST approach:
F – Face: One side of the face droops
A – Arms: Weakness or numbness in one arm
S – Speech: Speech becomes unclear or difficult
T – Time: Seek emergency medical attention immediately
Other warning signs may include sudden vision loss, severe dizziness, confusion or difficulty walking.
How can you tell the difference between a migraine, stroke and brain aneurysm?
Some symptoms can overlap, which is why sudden or unusual neurological symptoms require careful assessment.
Features that may raise concern include:
- A sudden severe headache unlike previous headaches
- New neurological symptoms
- Symptoms that appear suddenly
- Loss of consciousness
- Seizures
- New weakness, numbness or speech difficulties
Medical imaging is often needed to determine whether symptoms are related to a stroke, aneurysm or another neurological condition.
What tests are used to diagnose brain aneurysms and strokes?
Doctors may use several investigations depending on the symptoms and clinical situation:
- CT brain scan
- CT angiography (CTA)
- MRI brain
- MR angiography (MRA)
- Cerebral angiography
These tests help identify bleeding, blocked blood vessels, aneurysms and other vascular abnormalities.
How Does a Stroke Differ From a Brain Aneurysm?
A bulge or ballooning of a blood vessel in the brain is a brain aneurysm. It can be there for years without detection. But should that bulge burst it can cause serious health issues and nearly 50 percent of the time resulting in death. Some brain aneurysm risk factors include family history, high blood pressure, smoking, atherosclerosis, and binge drinking. Additionally, women have a higher risk of developing a brain aneurysm than men.
A stroke is the result of a blockage of the blood flow (known as an ischemic stroke) or bleeding (known as a hemorrhagic stroke) of the brain resulting in a loss of brain function. While there are many causes, 1 in 4 strokes are from blocked blood vessels in the brain. The rest are because of bleeding in the brain. One of the causes of hemorrhagic stroke is a brain aneurysm. The results can be minimal to fatal depending upon the severity of the stroke. Stroke risk factors include high blood pressure, heart disease, diabetes, obesity, high cholesterol, smoking, and excessive alcohol use.
Either one can occur without warning.
Symptoms of a Brain Aneurysm and Stroke
Common symptoms for both brain aneurysm and stroke include family history, nausea, blurred vision, confusion, trouble speaking, and a loss of consciousness.
Symptoms of a brain aneurysm are limited to the head while a stroke can result in symptoms that affect other areas of the body including weakness in the arm or leg on one side.
If you or a loved one starts to show any of the above symptoms, you can use the FAST method to help analyze if it is a stroke, or possibly an aneurysm. FAST stands for:
- Face drooping
- Arm weakness
- Speech difficulty
- Time to call emergency services
If a brain aneurysm rupture is suspected, it also warrants immediate medical attention. In Singapore, call 995, or rush the individual to an emergency room.
Medical Diagnosis and Treatment
If you have a family history for brain aneurysms, you should see a brain aneurysm specialist in Singapore, especially if you are female. Set up an appointment with Dr. Manish Taneja, a leading brain aneurysm specialist at the Supreme Vascular and Interventional Cinic for review and testing which may include a CT scan, MRI, or an angiogram for early brain aneurysm detection.
Similar testing will be done in case of emergency symptoms for diagnosis before brain aneurysm or stroke treatment. Minimally non-invasive treatments of coiling or clipping may be the best choice for a brain aneurysm, although surgery may be warranted.
In some cases of stroke, surgery may also be needed and often, rehabilitation follows. Clot-busting drugs may also be prescribed.
Prevention is the Best Medicine
For the prevention of a brain aneurysm rupture or a stroke, maintaining a healthy lifestyle by following a proper diet, keeping excessive weight off, and getting regular exercise are key. Additionally, proper management of blood pressure, quitting smoking, and limiting alcohol are essential. Because ruptured brain aneurysms and stroke may share overlapping neurological symptoms, recognising severe warning signs and seeking urgent evaluation is important.
Having routine cardiac check-ups and screenings for brain aneurysms aids in early detection. Symptoms such as sudden headaches, dizziness, weakness, or neurological changes can feel alarming. Some patients may prefer earlier medical evaluation rather than waiting several days for consultation.
When to Seek Vascular Specialist Assessment in Singapore
Patients may seek specialist advice after a stroke scare, abnormal brain scan or concern that symptoms could be related to a brain aneurysm.
Consider specialist assessment if you:
- Have experienced sudden neurological symptoms such as weakness, numbness, speech difficulty or vision changes
- Had a sudden severe headache that was different from previous headaches
- Were diagnosed with a brain aneurysm during stroke investigations
- Have been told you have an abnormal blood vessel finding on CTA, MRI, MRA or cerebral angiography
- Experienced a transient ischaemic attack (TIA or “mini-stroke”)
- Have a family history of brain aneurysms or stroke-related bleeding
- Want a second opinion about brain aneurysm monitoring or treatment options
A specialist review involves understanding the cause of symptoms, reviewing brain and vascular imaging, assessing future risks and explaining treatment pathways.
For some patients, this may include monitoring. For others, minimally invasive endovascular treatment may be considered depending on the condition and anatomy.
Seek emergency medical attention immediately if you experience sudden weakness, facial drooping, difficulty speaking, severe unexplained headache, seizures, confusion or loss of consciousness. These may indicate a stroke or ruptured brain aneurysm requiring urgent treatment.
Recognizing Symptoms Early and Seeking Help
Learning and understanding the difference between brain aneurysm and stroke symptoms helps with quick response and prompt treatment. If you or a loved one incurs any early warning signs for stroke or brain aneurysm, don't wait, seek help. Contact the Supreme Vascular and Interventional Clinic for an appointment with Dr. Manish Taneja today for proper screening and early detection.
Brain Aneurysm Resources
Discover brain aneurysm resources that go beyond the basics designed for patients. Understand the meaning of a brain aneurysm condition, the causes, symptoms, signs, and more. Connect with your brain health.
Put Brain Aneurysm on Your Health Radar
Did you experience the worst headache of your life? Thoughts could be racing through your mind. A brain aneurysm is a weak spot in a blood vessel in the brain that can change over time. The key concern is when an aneurysm ruptures, which can disrupt blood flow, affect brain tissue, and lead to serious brain damage. Controllable conditions like high blood pressure can increase this risk and treatment options can depend on the condition. Surgical clipping is one option that prevents blood from entering the weakened area. In many cases, minimally invasive treatments can also be used to restore normal blood flow and reduce risk. We have created structured guides to help you explore each stage in more detail:
A simple (computed tomography) CT scan could be just what the doctor ordered and the first step in early detection and prevention of a brain aneurysm. Come in for an easy consultation with our brain aneurysm specialist in Singapore to be on your health radar.
Other Health Conditions
The Supreme Vascular and Interventional Clinic is your "go-to" facility for various neurointerventional / stroke conditions and treatments. To arrange an appointment with Dr. Manish Taneja, our brain aneurysm specialist, contact us. You can also call us at (+65) 6904 8084 for a consultation.