Stroke Warning Signs: The FAST Test and Why Every Minute Counts

Illustration of the FAST test for spotting a stroke and calling for help quickly

She was halfway through dinner when the spoon slipped out of her hand. It clattered onto the plate. Her daughter laughed and passed it back to her. Then she noticed that her mother’s smile had gone crooked, and that only one side of her face was moving. Her mother tried to say that she was fine. The words came out soft and blurred, like a recording played too slowly.

So the family waited. They offered her a glass of water and decided she was simply tired. By the time they reached the hospital, more than five hours had passed. The treatment that could have dissolved the clot in her brain was no longer available.

This is the most common way that a stroke goes wrong in Malaysia. It is rarely because the hospital was too far away. It is because nobody at the table recognised what they were looking at.

Stroke is more common here than most people realise

Stroke is not an unusual event in this country. The Department of Statistics Malaysia recorded cerebrovascular disease, the medical name for stroke, as the third most common cause of medically certified death in 2023. It accounted for 7.2 percent of those deaths. Malaysia’s own clinical practice guideline on ischaemic stroke says the same thing, describing stroke as the third leading cause of death here.

It also does not happen only to the elderly, because it can arrive in your forties or your fifties. The conditions responsible for it, particularly high blood pressure and diabetes, are extremely common among us. Both are invisible for years.

What a stroke actually is

Your brain has no fuel of its own. It depends entirely on the circulation delivered to it, second by second, and a stroke occurs when that delivery is interrupted. Brain cells begin to die within minutes. The part of the body they control immediately stops working.

There are two principal categories of stroke, and they are opposites of each other.

Type What happens How common
Ischaemic stroke A clot obstructs an artery inside the brain, so circulation cannot reach the tissue beyond it. The more common of the two
Haemorrhagic stroke A blood vessel ruptures, and blood escapes into the brain and compresses it. Less common, but considerably more often fatal

From the outside, the two conditions look identical. The face droops in the same way, the arm falls in the same way, and no doctor can distinguish them simply by looking. Neither can you.

That difference matters enormously. One category is treated by dissolving a clot, and the other would be made considerably worse by exactly the same medication. The Ministry of Health clinical practice guideline on the management of ischaemic stroke therefore makes a brain scan compulsory. No clot treatment is given without one. It is also why you must never give a stroke patient an aspirin at home. If the underlying problem is a haemorrhage, aspirin will make that bleeding worse.

The FAST test

FAST is a four-step examination that anybody can perform, and it takes less than a minute. The Malaysian stroke guideline recommends it for ambulance crews and emergency department staff. It works just as well at a dinner table.

F is for Face

Ask the person to smile, or to show you their teeth. Watch both sides carefully. Has one side of the mouth drooped, or is one eyelid or cheek sagging?

A is for Arms

Ask them to lift both arms straight out in front with the palms upward, and to hold that position. Does one arm drift slowly downward, or fail to move altogether?

S is for Speech

Ask a simple question. Then ask them to repeat a short sentence back to you. Are the words slurred, are they reaching for the wrong words, or do they seem unable to understand you?

T is for Time

If you observe any one of these signs, the answer is never to wait and see what happens. Telephone 999 immediately, note the time the symptoms began, and give the ambulance crew that information. It will influence every medical decision made about that person for the remainder of the day.

A single sign is sufficient, and the person does not need to have all three. Many people experiencing a stroke will insist that they are perfectly fine, because the stroke has damaged the region of the brain responsible for recognising the problem. Do not let them talk you out of calling.

The two extra letters: BE-FAST

Some strokes affect the back of the brain and never involve the face or the arms at all. The Malaysian guideline therefore also permits a longer version called BE-FAST, which adds two additional signs at the beginning.

  • B is for Balance. The person suddenly cannot walk straight, loses their coordination, or becomes violently dizzy for no apparent reason.
  • E is for Eyes. The person suddenly loses vision in one eye or in both eyes, or begins seeing double.

A sudden and severe headache, unlike any headache the person has experienced before, is another warning sign. It matters particularly when it arrives together with vomiting or a reduced level of consciousness. That combination can indicate bleeding inside the brain, so treat it as an emergency.

Why minutes matter: time is brain

Doctors have a phrase for this, and the phrase is time is brain. Every minute that an artery remains obstructed, additional brain cells die permanently. They do not regenerate.

The treatments that can reverse a stroke are real and they are effective. They also operate on a clock, and that clock is extremely short.

Thrombolysis: the clot-dissolving drug

A medication called alteplase is delivered through a drip to dissolve the clot. The Malaysian stroke guideline recommends it for up to 4.5 hours from the moment the symptoms began. In selected patients, and only where advanced imaging shows brain tissue that is still recoverable, that window can be extended. Most people will not qualify for the extension.

Thrombectomy: pulling the clot out

When the clot is lodged in a large artery, a specialist can thread a fine tube into the brain and physically remove it. The Malaysian guideline recommends this within 6 hours of onset. With the right imaging findings, some patients can still benefit up to 24 hours. The guideline is clear that nobody should rely on that extension, because the faster the artery is reopened, the better the recovery generally is.

Now look at those numbers again. Four and a half hours, or six hours, must cover recognising the symptoms, deciding to telephone, the ambulance journey, the emergency department, the brain scan and the blood investigations. The hour a family spends hoping the symptoms will disappear by themselves comes directly out of that allowance.

Not every hospital in Malaysia can provide these treatments. The guideline itself notes that clot-dissolving therapy is available at some hospitals, and that thrombectomy is offered at a limited number of specialised centres. This is another reason to telephone 999 rather than drive. The ambulance service can deliver the person to a hospital equipped for stroke, and can warn that hospital in advance that a stroke patient is arriving.

What to do while you wait for the ambulance

  • Telephone 999 first, before you contact anybody else. Say the word stroke to the operator, and describe exactly what you observed.
  • Write down the time the symptoms began. If the person awoke with the symptoms already present, note instead the time they were last seen completely well.
  • Stay with them. Do not leave them alone, even for a few minutes, because their condition can deteriorate rapidly.
  • Let them lie down with the head and shoulders slightly raised. Loosen any tight clothing around the neck and the chest.
  • If they are vomiting, or unconscious but still breathing, roll them gently onto their side. This keeps the airway clear.
  • Gather their medicines, or at least a written list of them. Blood-thinning medication matters enormously to the doctors who will be treating them.
  • Remain calm, and continue talking to them. They may understand considerably more than they are able to communicate back to you.

What not to do

  • Do not give aspirin, or any other medication. Until a brain scan is performed, nobody can determine whether this is a clot or a haemorrhage.
  • Do not give food, drink or even water. A stroke can paralyse the swallowing muscles, and liquid can then enter the lungs.
  • Do not let them sleep it off. Sleeping through the treatment window is exactly how that window gets lost.
  • Do not massage the person, prick their fingers, or attempt any home remedy. None of these will reopen a blocked artery, and every one of them consumes time.
  • Do not wait for a relative to arrive and offer an opinion. Telephone the ambulance first, and telephone the family afterwards.

A stroke that goes away is still a warning

Sometimes the face droops, the arm weakens and the speech slurs, and then everything returns to normal within minutes or a couple of hours. It is extremely tempting to feel relieved and simply carry on.

That event is called a transient ischaemic attack, or TIA, and it is a miniature stroke that resolved by itself. It is also one of the loudest warnings medicine can give you, because a complete stroke may follow within days.

A TIA is an emergency even after the symptoms have gone, so go to hospital on the same day. Doctors will investigate the cause, examine the arteries in your neck, check your heart rhythm and begin treatment to protect you. The Malaysian guideline recommends a short course of two antiplatelet medicines after a minor stroke or a high-risk TIA. That decision has to be made quickly.

A second stroke is not a remote possibility either, unfortunately. The Malaysian guideline puts the risk of another stroke at 3 to 4 percent in the first month, and at about 12 percent in the first year. Prevention after the first event is not optional.

What raises your risk

The Malaysian stroke guideline names high blood pressure as the most common risk factor for stroke in this country, followed by diabetes. Both are conditions that people live with for years without experiencing any symptoms whatsoever.

The same guideline sorts the risks you can change into three groups.

  • Lifestyle risks: smoking, physical inactivity and unhealthy eating.
  • Metabolic risks: high systolic blood pressure, high cholesterol, high fasting blood sugar, reduced kidney function and a high body mass index.
  • Environmental risks: air pollution and lead exposure.

An irregular heartbeat called atrial fibrillation matters as well. It allows clots to develop inside the heart, and those clots can then travel upward into the brain. It is treatable once it has been identified, which is why an irregular pulse is always worth mentioning to your doctor.

Practical steps that lower your stroke risk

  • Know your blood pressure number. Not approximately, but the actual number, measured recently. It is the single most powerful lever available to you.
  • Get your blood sugar and your cholesterol checked. If you have diabetes, it is worth understanding how diabetes damages your blood vessels, because the damage that harms the heart also harms the brain.
  • Exercise for at least 30 minutes a day, or 150 minutes a week. This is exactly what the Malaysian guideline recommends, and a brisk walk qualifies.
  • Cut back on salt. Salt raises blood pressure, and blood pressure drives stroke, so our guide to how much salt, sugar and fat is too much is a practical place to start.
  • Eat more fruit and more leafy green vegetables. The Malaysian guideline identifies this specifically as beneficial for prevention.
  • Stop smoking. There is no safe level of smoking, and quitting helps at any age.
  • Take your medication exactly as it was prescribed. Blood pressure tablets do not protect you on the days that you skip them.
  • Do not ignore chest symptoms either. The warning signs of heart trouble overlap heavily with stroke risk, and we cover them in our guide to the early warning signs that your heart is in trouble.

After a stroke: recovery takes a team

Surviving a stroke is the beginning of the story rather than the end of it. What follows is rehabilitation, and rehabilitation is slow, repetitive and difficult.

The brain does have some capacity to rewire itself, and healthy regions can gradually learn to take over responsibilities that the damaged region previously handled. This recovery does not happen through resting. It happens through repetition, guided by physiotherapists, occupational therapists and speech therapists.

Early recovery tends to be the most rapid, although improvement can continue for many months afterwards. Progress is uneven, and it is different for everybody. Some people recover nearly everything they lost, while others live with permanent weakness, difficulty speaking, or difficulty swallowing.

The Malaysian guideline recommends that stroke patients be treated in a dedicated stroke unit. Doing so demonstrably reduces both death and disability. It also asks doctors to screen for complications that are frequently missed, including confusion in older patients and the risk of falling during rehabilitation.

Support outside the hospital matters equally. The National Stroke Association of Malaysia runs rehabilitation centres and support programmes for survivors and their families in several states.

The one thing to remember

Learn FAST, and teach it to the people you eat dinner with. Face, arms, speech, and time.

A stroke is not painful, and that is precisely what makes it dangerous. There is nothing to make a family panic, so instead they wait, and they discuss it, and they hope. Meanwhile the clock that decides how much of that person comes back is already running.

One drooping face, one weak arm, or one slurred sentence is enough. Call 999. For more on protecting the blood vessels that feed your brain and your heart, see our heart health section.

A note on this article. This is general health information, not personal medical advice. Everyone’s situation is different, and this article cannot account for your medical history, your medications, or your current condition. Always speak to your doctor or pharmacist before changing your diet, starting a supplement, or acting on anything you read here. If you are worried about your symptoms, contact your nearest clinic or hospital.

Guidelines and figures change over time. The information here reflects the sources available when this article was last updated, shown at the top of the page. Where a national guideline or registry is named, check the latest edition for the current position.