Stroke: Learn the FAST Signs — Every Minute Counts

A stroke can happen to anyone — young or old, with or without warning. It does not always look dramatic. Sometimes it is a lopsided smile, a suddenly heavy arm, or words that come out wrong. The people who recognise it fast and act in the first minutes give the patient the best possible chance. The people who wait — hoping it will pass — often do not.

What Is a Stroke — In Plain Language

The brain controls every function in the body — movement, speech, vision, memory, breathing. To do this, it needs a constant, uninterrupted supply of blood carrying oxygen and nutrients. A stroke happens when that supply is suddenly cut off.

There are two main types:

• Ischaemic stroke (about 85% of cases) — a blood clot blocks an artery supplying the brain. The same mechanism as a heart attack, but in the brain.
• Haemorrhagic stroke — a blood vessel in the brain bursts, flooding surrounding tissue with blood and causing pressure damage.

One critical difference from a heart attack: stroke patients often feel no pain. There is no chest pressure, no obvious physical distress. The damage is happening silently inside the brain — which is exactly why recognising the external signs (FAST) is so important. The patient may not know something is seriously wrong. The family or bystander is often the one who must act.

The FAST Signs — What Every Family Must Know

FAST is a simple, proven tool used by emergency services worldwide to identify stroke in seconds. You do not need medical training to use it. Every adult and older child should know it.

Figure 1: The FAST signs of stroke. If you see any one of these signs, call +91-8282 8989 18 immediately — do not wait for all four to appear.

One important point: you do not need to see all three signs. A single FAST sign that appeared suddenly is enough to call. The test is not about certainty — it is about speed. If you are unsure, the right answer is always to call and let the emergency team assess.

Beyond FAST — Signs People Miss

FAST covers the most common and recognisable stroke presentations, but not all strokes show up in the face, arm, and speech. Some strokes — particularly those affecting the back (posterior) part of the brain — present with different symptoms that are frequently missed or dismissed.

The key word across all stroke signs — FAST or beyond — is sudden. Stroke symptoms come on abruptly, not gradually. A headache that has been building all day is far less likely to be a stroke than a headache that hit with full force in a single moment. Sudden onset is the signal.

Why Every Minute Matters — Time Is Brain

The phrase used by neurologists is "time is brain" — and the numbers behind it are stark. During a stroke, approximately 1.9 million brain cells die every minute that blood flow is disrupted. Over an hour, that is more than 100 million neurons — the equivalent of nearly 3.5 years of normal ageing compressed into 60 minutes.

This is not a gradual process that can afford to wait for tomorrow's appointment or the next morning's clinic. Every minute between the onset of symptoms and the restoration of blood flow is brain tissue that may be permanently lost — and with it, the ability to speak, move, remember, or live independently.

There are time-sensitive treatments for ischaemic stroke that can dissolve a clot and restore blood flow — but they must be given within a specific window from when symptoms began. A patient who arrives at hospital within the first hour is in a very different position from one who arrives three hours later. The treatment window does not wait.

What to Do in the First Minutes

What Never to Do

TIA — The Warning Stroke Most People Ignore

Who Is at High Risk

Understanding your personal risk does two things: it makes you take sudden symptoms more seriously, and it gives you the chance to act on modifiable risks before a crisis happens.

Risk factors you cannot change

• Age — risk doubles every decade after 55
• Family history — a parent or sibling who had a stroke raises your risk
• Prior stroke or TIA — the strongest predictor of a future stroke

Risk factors you can act on

• High blood pressure — the single biggest modifiable risk factor for stroke; many people do not know they have it until it causes a crisis
• Diabetes — damages blood vessels and accelerates atherosclerosis
• Smoking — doubles stroke risk; the benefit of quitting begins immediately
• Atrial fibrillation (irregular heartbeat) — causes clots that travel to the brain; many people have it without knowing
• High cholesterol — builds up in artery walls and sets the stage for clot formation
• Obesity and physical inactivity — drive blood pressure, diabetes, and cholesterol simultaneously
• Excessive alcohol — raises blood pressure and increases haemorrhagic stroke risk

What Happens When You Arrive at Sri Ganga

Knowing what to expect removes fear and helps families support care effectively.

• Brain scan immediately — a CT scan distinguishes ischaemic from haemorrhagic stroke and guides the treatment pathway. If you called ahead, this is already being prepared.
• Blood tests — to check blood sugar, clotting, and other factors that affect treatment decisions.
• Specialist alert — the neurology consultant is contacted from the moment you call, not after you arrive.
• Continuous monitoring — blood pressure, oxygen, heart rhythm are monitored continuously from arrival.
• Treatment begins before paperwork — registration and insurance are handled by an attendant while the patient is already being cared for. Never delay coming in for administrative reasons.

For the full picture of the emergency room process — triage, stabilisation, admission decisions — see our 24×7 Emergency Care Complete Patient Guide. For more on stroke facts and long-term risk factors, our earlier article on interesting facts about stroke covers the broader picture.

Frequently Asked Questions