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Stroke Warning Signs: How to Spot a Stroke Fast with FAST & BE FAST

A stroke is a medical emergency where every minute counts. Knowing the warning signs, and acting on them straight away, can be the difference between recovery and lifelong disability. Here’s how to recognise a stroke using FAST and BE FAST, and what to do if it happens while you’re in Bali.

What Is a Stroke?

A stroke happens when blood flow to part of the brain is suddenly blocked by a clot (ischemic stroke, the most common type) or when a blood vessel in the brain bursts (hemorrhagic stroke). Without a steady supply of oxygen, brain cells start to die within minutes.

Stroke is the second-leading cause of death worldwide and a leading cause of long-term disability. According to the World Stroke Organization, around one in four adults over 25 will have a stroke in their lifetime, and it can affect younger, active people too, not only the elderly.

Two doctors reviewing a brain MRI scan for signs of stroke
Fast recognition and fast transfer to hospital give a stroke patient the best chance of recovery.

FAST: The Classic Way to Spot a Stroke

FAST was created in the UK in 1998 by stroke doctors and ambulance teams as a quick check anyone can do in seconds:

  • Face – Ask the person to smile. Does one side of the face droop?
  • Arms – Ask them to raise both arms. Does one arm drift down or feel weak or numb?
  • Speech – Ask them to repeat a simple phrase. Is it slurred, strange or hard to understand?
  • Time – If you see any of these signs, call for emergency help immediately.

BE FAST: Two Extra Signs That Catch More Strokes

FAST can miss strokes that affect the back of the brain, the area that controls balance and vision. Research published in the journal Stroke showed that adding Balance and Eyes to the checklist reduces the number of strokes that go unrecognised, which is why many hospitals and emergency services now teach BE FAST.

SignWhat You May Notice
B – BalanceSudden dizziness, loss of balance or coordination, trouble walking
E – EyesSudden blurred or double vision, or loss of vision in one or both eyes
F – FaceOne side of the face droops or feels numb; the smile looks uneven
A – ArmsOne arm (or leg) is weak or numb, or drifts down when both are raised
S – SpeechSlurred, garbled or confused speech, or trouble understanding others
T – TimeCall for emergency help immediately and note when symptoms started

Other sudden symptoms can include a severe headache with no known cause, confusion, or numbness on one side of the body. The key word is sudden.

Call for Help Immediately

If you notice any BE FAST sign, even if it seems to pass, call 112 (general emergency) or 119 (ambulance) in Indonesia, or our 24/7 team on +62 811 3999 599. Don’t wait to see if it improves, and don’t drive the person yourself. Note the exact time symptoms started, or when the person was last seen well, as this decides which hospital treatments are possible.

Blood pressure check with a digital monitorDoctor listening to a patient's heart with a stethoscope

Regular checks of blood pressure, blood sugar and cholesterol help you understand and lower your stroke risk.

Why Time Matters: “Time Is Brain”

In a typical large-vessel ischemic stroke, an estimated 1.9 million brain cells are lost every minute without treatment. Clot-dissolving medication (thrombolysis) is generally given within 4.5 hours of symptom onset, and some patients with a large blocked artery may be eligible for clot removal (thrombectomy) up to 24 hours. Both work best the earlier they are given, and both need a hospital with CT scanning and stroke specialists, so getting to the right hospital quickly matters more than anything else.

What to Do While Waiting for the Ambulance

  • Note the time symptoms started, or when the person was last seen well
  • Keep them calm, comfortable and safe; if they are drowsy or vomiting, turn them onto their side
  • Do not give food, drinks or medication, including aspirin, as some strokes are caused by bleeding
  • Loosen tight clothing and stay with them until help arrives
  • Gather their medication list, passport or ID, and travel insurance details for the hospital

Don’t Ignore a “Mini-Stroke” (TIA)

A transient ischemic attack (TIA) causes the same signs as a stroke, but they go away, often within minutes. Because the symptoms clear up, many people ignore them. A TIA is a serious warning sign that a full stroke may follow, sometimes within days, so treat it as an emergency and get assessed the same day.

Know Your Stroke Risk Factors

Most strokes are linked to risk factors that can be managed. Globally, metabolic risks such as high blood pressure, high blood sugar, high cholesterol and excess weight account for the majority of stroke burden.

  • High blood pressure, the single biggest risk factor
  • Diabetes and high blood sugar
  • High cholesterol
  • Smoking
  • Atrial fibrillation (an irregular heartbeat)
  • Excess weight and physical inactivity
  • Heavy alcohol use
  • Age, family history, or a previous stroke or TIA

If you’re travelling, keep taking your blood pressure, diabetes or blood-thinning medication on schedule, bring enough supply for your whole trip, and carry a written list of your medications. Long days, heat and holiday drinks make it easy to miss doses.

How Asia Pacific Medical Centre Can Help

Our team is available 24/7. If a stroke is suspected, our ambulance service provides fast, medically accompanied transfer to a hospital with stroke facilities. For prevention, our doctors offer blood pressure checks and consultations, our laboratory can test blood sugar and cholesterol, and our on-call doctors can visit your hotel or villa.

Learn more about our Ambulance service, or book a Doctor Consultation.

Nurse caring for an elderly patient
Our 24/7 team is ready to help, from risk checks to emergency transfers.

Sources

CDC: Signs and Symptoms of Stroke
https://www.cdc.gov/stroke/signs-symptoms/index.html

Aroor S, et al. BE-FAST: Reducing the Proportion of Strokes Missed Using the FAST Mnemonic. Stroke, 2017
https://pubmed.ncbi.nlm.nih.gov/28082668/

World Stroke Organization: Global Stroke Fact Sheet 2025
https://pubmed.ncbi.nlm.nih.gov/39635884/

Saver JL. Time Is Brain — Quantified. Stroke, 2006
https://doi.org/10.1161/01.STR.0000196957.55928.ab

Canadian Stroke Best Practice Recommendations: Acute Ischemic Stroke Treatment
https://www.strokebestpractices.ca/recommendations/acute-stroke-management/acute-ischemic-stroke-treatment

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