Stroke: Symptoms, Risks, and Causes

Stroke is one of the leading causes of death and long-term disability worldwide, and it remains the leading cause of death in Indonesia. A stroke happens when blood flow to the brain is interrupted or a blood vessel ruptures, and brain cells begin to die within minutes.

Recognizing stroke symptoms and stroke signs early can significantly improve recovery. This guide covers the causes, risk factors, diagnosis, and treatment of stroke, and when to seek emergency care.

What Is a Stroke?

A stroke is a medical emergency: the brain's blood supply is disrupted, and brain tissue can be damaged within minutes. There are two main types of brain stroke.

Ischemic Stroke

Ischemic stroke is the most common type, caused by a blood clot blocking an artery supplying the brain, and is linked to atherosclerosis or heart conditions.

Hemorrhagic Stroke

Hemorrhagic stroke occurs when a weakened blood vessel bursts, causing bleeding in or around the brain, linked to uncontrolled high blood pressure or brain aneurysms.

Stroke Symptoms and Warning Signs

Stroke symptoms usually appear suddenly and should never be ignored. The FAST method helps you recognize the most common stroke warning signs.

Remember FAST

• F for Face: One side droops, or the smile looks uneven.
• A for Arms: Weakness or numbness in one arm.
• S for Speech: Slurred or difficult speech.
• T for Time: Call emergency medical services immediately.

Other Stroke Symptoms

Other signs include:

• Sudden numbness
• Vision loss
• A severe headache with no known cause
• Dizziness
• Loss of balance
• Confusion
• Difficulty walking or swallowing

Symptoms vary by which brain area is affected.

What Causes Stroke?

Causes of Ischemic Stroke

A blood clot blocking a brain artery, often due to atherosclerosis, small-vessel disease, or a clot traveling from the heart, linked to atrial fibrillation and other cardiovascular conditions.

Causes of Hemorrhagic Stroke

Bleeding in or around the brain, most often from uncontrolled hypertension, brain aneurysms, arteriovenous malformations, blood-thinning medications, bleeding disorders, or less commonly, brain tumors.

Stroke Risk Factors

Non-Modifiable Risk Factors

• Older age
• Male sex (risk rises in women after menopause)
• Family history of stroke
• Genetics

Modifiable Risk Factors

• High blood pressure (the most important risk factor)
• Diabetes and high cholesterol
• Smoking
• Obesity and physical inactivity
• An unhealthy diet
• Excessive alcohol consumption
• Heart disease
• Sleep apnea

Controlling these conditions can significantly reduce your stroke risk.

Why High Blood Pressure Is the Biggest Stroke Risk Factor

High blood pressure damages and weakens blood vessel walls over time, increasing the risk of both ischemic and hemorrhagic stroke. Regular monitoring, lifestyle changes, and medication adherence help keep this risk in check.

How Is Stroke Diagnosed?

Stroke diagnosis moves quickly to determine the right treatment. It typically involves:

• Medical history, plus a physical and neurological examination
• Blood tests
• A CT scan and MRI
• An ECG, carotid ultrasound (when appropriate), and echocardiogram (for selected patients)

Stroke Treatment

Treatment for Ischemic Stroke

• Clot-dissolving medication (thrombolysis)
• Mechanical thrombectomy for selected patients
• Blood-thinning medications after evaluation
• Blood pressure and cholesterol management

Treatment for Hemorrhagic Stroke

• Blood pressure control
• Reversal of anticoagulants, when appropriate
• Surgical intervention for selected patients
• Intensive neurological monitoring

Stroke Rehabilitation

Recovery often continues after discharge through physical, occupational, and speech therapy, alongside long-term follow-up and lifestyle changes to reduce recurrence risk.

Can Stroke Be Prevented?

Yes, many strokes can be prevented by managing modifiable risk factors, including through a health screening package. Practical steps include:

• Monitoring blood pressure, diabetes, and cholesterol
• Stopping smoking
• Exercising regularly and maintaining a healthy weight
• Eating a heart-healthy diet, low in salt and alcohol
• Attending regular health screenings

When Should You Seek Emergency Medical Care?

Seek emergency care immediately for facial drooping, arm weakness, speech difficulties, a sudden severe headache, vision changes, numbness, loss of consciousness, or sudden dizziness. Waiting for symptoms to improve can lead to permanent brain damage or death.

Stroke Diagnosis and Emergency Care at Bali International Hospital

Our international hospital in Bali provides emergency assessment for suspected stroke, supported by advanced brain imaging, personalized treatment planning, and neurology-led rehabilitation support. If you or someone around you develops stroke symptoms, seek emergency medical care immediately.

Every minute counts. You can book an appointment with our Neurology or Internal Medicine specialists to assess your stroke risk, or contact our hospital to learn more.

Frequently Asked Questions

What Are the Early Signs and Symptoms of a Stroke?

The earliest signs often follow the FAST pattern:

• Facial drooping
• Arm weakness
• Slurred speech

Other early symptoms include sudden numbness, vision changes, dizziness, or a severe headache with no known cause.

What Causes a Stroke to Happen?

A stroke happens when a blood clot blocks an artery in the brain (ischemic stroke) or a blood vessel ruptures and bleeds into the brain (hemorrhagic stroke). Ischemic stroke is more common.

Who Is Most at Risk of Having a Stroke?

People with high blood pressure, diabetes, high cholesterol, heart disease, or a family history of stroke face a higher risk, as do smokers and older adults. High blood pressure is the single most important risk factor.

Can Stroke Symptoms Appear and Disappear?

Yes. This can happen with a transient ischemic attack (TIA), or mini-stroke, where symptoms resolve within an hour, sometimes up to 24 hours.

A TIA is still a medical emergency: about one in three people who have one will go on to have a major stroke, and it cannot be told apart from a stroke without immediate evaluation.