A stroke is a brain attack. It happens when blood flow to part of the brain is cut off, either by a clot (ischemic stroke) or by bleeding (hemorrhagic stroke). Brain cells begin to die within minutes, so stroke care is one of the most time-sensitive emergencies in medicine. The good news is that the most common signs are easy to learn and easy to spot, even without any medical training.
The FAST test
FAST is a simple memory tool to help anyone identify a stroke quickly:
- F - Face drooping: Ask the person to smile. Does one side of the face droop or feel numb?
- A - Arm weakness: Ask them to raise both arms. Does one drift downward?
- S - Speech difficulty: Ask them to repeat a simple sentence. Is speech slurred or strange?
- T - Time to call emergency services: If you see any of these signs, call immediately and note the time symptoms started.
BE-FAST: two more signs worth knowing
Some strokes affect balance and vision before they affect the face or arms. BE-FAST adds two early clues: B for sudden loss of Balance or coordination, and E for sudden Eye changes such as blurred or double vision, or loss of vision in one or both eyes.
Call for help immediately
Stroke is always an emergency. Call 911 (US/Canada), 999 (UK), or 112 (EU) the moment you notice any sign, even if it seems to pass. Note the exact time symptoms began, because some clot-busting treatments only work within a narrow window. Do not wait to see if it gets better, and do not give the person food, drink, or medication.
What is a mini stroke (TIA)?
A transient ischemic attack, or TIA, causes stroke-like symptoms that resolve within minutes to hours. It can feel like a false alarm, but it is a serious warning: a significant share of people who have a TIA go on to have a full stroke soon after, sometimes within days. A TIA still needs urgent medical evaluation.
Why time matters so much
During an ischemic stroke, the brain can lose around two million nerve cells every minute that treatment is delayed. Faster recognition means faster treatment, which means better odds of recovery and less long-term disability. Knowing FAST is something you can teach your whole family in five minutes.
Lowering your stroke risk
- Keep blood pressure in a healthy range, the single biggest modifiable risk factor
- Do not smoke, and limit alcohol
- Manage diabetes and cholesterol with your clinician
- Stay active and maintain a healthy weight
- Ask your doctor about atrial fibrillation, an irregular heartbeat that raises clot risk
Talk to a doctor
If you have had stroke-like symptoms, high blood pressure, or an irregular heartbeat, a verified doctor on iHealix can review your risk factors and guide next steps. For any active stroke sign, call emergency services first.
This article is for general information only and does not replace advice from a licensed doctor or pharmacist.