When a stroke occurs, every single minute matters. Brain cells begin to die rapidly when blood flow is interrupted, meaning that recognizing the earliest warning signs and acting immediately can prevent permanent disability or save a life.
Medical professionals and stroke organizations summarize the most critical early warning signs using the acronym F.A.S.T., along with several other sudden symptoms that require emergency medical attention:
The F.A.S.T. Warning Signs
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F – Face Drooping: Does one side of the face droop, or is it numb? If the person tries to smile, is the smile uneven or lopsided?
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A – Arm Weakness: Does one arm feel weak or numb? If the person tries to raise both arms, does one drift downward uncontrollably?
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S – Speech Difficulty: Is their speech slurred? Are they unable to speak clearly, or do they have trouble understanding simple sentences when spoken to?
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T – Time to Call 911 (or local emergency services): If you observe any of these signs—even if they go away—call emergency services immediately and note the exact time the symptoms first appeared.
6 Other Early Signs of a Stroke
In addition to the F.A.S.T. indicators, a stroke can also present with sudden-onset symptoms affecting vision, balance, and coordination:
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Sudden Confusion or Trouble Comprehending: Experiencing a sudden, uncharacteristic difficulty understanding speech, processing thoughts, or answering simple questions.
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Sudden Trouble Seeing in One or Both Eyes: Experiencing sudden blurred vision, double vision, blacking out in one eye, or a sudden loss of vision without pain.
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Sudden Severe Headache with No Known Cause: A blinding, “worst headache of your life” that strikes suddenly, often associated with a hemorrhagic stroke (bleeding in the brain).
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Sudden Loss of Balance or Coordination: Feeling suddenly dizzy, lightheaded, or losing the ability to walk straight, often mimicking severe vertigo.
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Sudden Trouble Walking or Loss of Coordination: Stumbling, tripping, or losing fine motor control in the limbs out of nowhere.
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Sudden Numbness or Weakness in One Entire Side of the Body: A sudden loss of feeling or strength down an entire vertical half of the body (face, arm, and leg simultaneously).
What to Do
If you suspect someone is having a stroke, do not wait to see if symptoms improve, and do not drive them to the hospital yourself. Call emergency services immediately so paramedics can begin life-saving evaluation on the way to a stroke-certified facility.
