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A sudden loss of balance, blurred vision or difficulty speaking may seem like an ordinary health problem at first. But when these symptoms appear unexpectedly, they could signal a stroke—a medical emergency in which every minute can make a difference.

Recognising the warning signs early can help people get urgent medical attention and improve their chances of recovery. One simple way to remember the symptoms is B.E. F.A.S.T., a widely used stroke-awareness message that highlights six warning signs and the importance of acting immediately.

The message is straightforward: Balance, Eyes, Face, Arms, Speech and Time. Knowing what each letter means could help someone recognise a stroke in a family member, a colleague or even a stranger.

What Is a Stroke?

A stroke occurs when the brain’s blood supply is interrupted or when a blood vessel in or around the brain ruptures and causes bleeding. Brain cells depend on a continuous supply of oxygen and nutrients. When that supply is disrupted, affected cells can begin to suffer damage.

There are two major types of stroke. An ischaemic stroke happens when a blood clot or blockage prevents blood from reaching part of the brain. A haemorrhagic stroke occurs when a blood vessel breaks and bleeding takes place in the brain or surrounding tissues.

Both conditions require urgent medical assessment. The symptoms alone cannot establish which type of stroke a person is experiencing. Doctors generally need brain imaging and other examinations to determine the cause and select the appropriate treatment.

What Does B.E. F.A.S.T. Mean?

The B.E. F.A.S.T. reminder helps people identify several common stroke warning signs.

B — Balance Loss

A person experiencing a stroke may suddenly become dizzy, lose coordination, stumble or struggle to walk normally. They may appear unable to maintain their balance even if they were walking comfortably moments earlier.

Sudden dizziness can have several causes, and not every episode indicates a stroke. However, when a new balance problem appears abruptly—particularly alongside other warning signs—it should be treated seriously.

E — Eye or Vision Changes

Watch for sudden changes in vision. These may include blurred or double vision, difficulty seeing clearly, or partial or complete loss of sight in one or both eyes.

People sometimes assume that a sudden vision problem is related to tiredness or an existing eye condition. But an abrupt change can also indicate that the brain’s visual pathways are affected.

Do not wait to see whether the problem improves before seeking emergency help.

F — Face Drooping

One side of the face may suddenly appear uneven or droop. The person might have difficulty smiling normally, and one side of the mouth may remain lower than the other.

If you suspect a stroke, you can ask the person to smile while emergency help is being arranged. An uneven smile is a warning sign, although the absence of facial drooping does not rule out a stroke.

A — Arm Weakness

Sudden weakness or numbness in an arm is another important warning sign. The person may struggle to lift both arms or keep them raised. One arm might drift downward, or the person may be unable to control it normally.

Stroke symptoms frequently affect one side of the body. Weakness or numbness can also involve the face or leg.

Do not assume that the person is simply tired or needs to rest if the weakness begins suddenly.

S — Speech Difficulty

A person having a stroke may slur their words, struggle to find the right words, speak in an unusual way or have difficulty understanding what others are saying.

You can ask the person to repeat a short, simple sentence while someone contacts emergency services. Speech that suddenly becomes unclear or confusing is a serious warning sign.

Some people may understand what is being said but cannot respond properly. Others may have difficulty understanding even familiar words.

T — Time to Get Emergency Help

The final letter is the most important action: time to call emergency services.

If you notice any of these warning signs, seek emergency medical assistance immediately. Do not wait for every symptom to appear. A person may experience only one of the signs, and that can still indicate a stroke.

Note the time the symptoms first appeared, or the last time the person was known to be well if the onset was unwitnessed. This information can help doctors assess which treatments may be appropriate.

In India, call 112 for emergency assistance. The National Ambulance Service can also be reached at 102. In other countries, use the local emergency number.

Why Acting Quickly Matters

Stroke treatment depends on the type of stroke, the location and extent of the damage, the patient’s medical condition and how much time has passed since symptoms began.

For certain ischaemic strokes, doctors may use medicines to dissolve a clot or perform a procedure to remove it. These treatments are suitable only for selected patients and have specific time and medical eligibility requirements. A haemorrhagic stroke requires a different approach.

Getting medical attention quickly allows doctors to perform the necessary assessments and determine the safest treatment. Delays can reduce the available treatment options and increase the risk of lasting disability or death.

A person who survives a stroke may experience difficulties with movement, speech, vision, memory or everyday activities. The effects vary widely, and prompt treatment may reduce the damage in some cases.

What Should You Do If Someone Shows Stroke Symptoms?

If you suspect a stroke, follow these steps:

• Call emergency services immediately. Do not wait for symptoms to disappear.

• Record when symptoms started. Tell the medical team what you observed and when.

• Arrange ambulance transport. Avoid driving the person yourself if emergency medical transport is available.

• Stay with the person. Keep them as safe and comfortable as possible while help is on the way.

• Do not give food, drinks or medicines unless instructed by a medical professional. Stroke can affect swallowing, and some medicines may be unsafe depending on the type of stroke.

• Do not ignore temporary symptoms. Even if the person appears to recover, urgent medical assessment is still necessary.

A transient ischaemic attack, often called a mini-stroke, can produce stroke-like symptoms that disappear. It is still a medical emergency and may signal an increased risk of a future stroke.

Can Stroke Happen to Younger People?

Although stroke risk generally increases with age, younger adults can also experience strokes. Risk factors include high blood pressure, diabetes, high cholesterol, smoking, physical inactivity, obesity and certain heart conditions. Previous strokes and some other medical conditions can also increase risk.

Managing blood pressure, controlling diabetes, avoiding tobacco, maintaining physical activity and following appropriate medical advice can help reduce stroke risk. However, a healthy lifestyle cannot eliminate the possibility of a stroke entirely.

People should not dismiss sudden neurological symptoms because they are young, physically active or have no known history of illness.

The Message Everyone Should Remember

B.E. F.A.S.T. is more than a memory aid. It is a practical reminder to recognise sudden changes in balance, vision, facial movement, arm strength and speech—and to act without delay.

Learning these signs may help someone identify an emergency before the affected person can explain what is happening. Sharing the information with family members, older relatives, colleagues and friends can also improve awareness.

If you suspect a stroke, do not wait, do not self-diagnose and do not rely on symptoms disappearing. Call emergency services and seek immediate medical care.