10 Early Warning Signs of a Stroke Everyone Should Know to Take Prompt Action

Recognizing a stroke early is critical. When a stroke occurs, every minute matters—prompt medical treatment can save lives and drastically reduce long-term disability.

The most widely recognized and easiest tool for remembering the primary signs of a stroke is the acronym FAST. However, strokes can present with a variety of neurological warning signs depending on which part of the brain is affected.

Here are 10 important early warning signs of a stroke that everyone should know:

The FAST Signs (The Most Common Indicators)

1. Face Drooping

   • What it looks like: One side of the face may droop or feel numb. If the person smiles, the smile is often uneven or lopsided.

2. Arm Weakness

   • What it looks like: One arm feels weak, heavy, or numb. If the person tries to raise both arms, one may drift downward or they may be unable to lift it at all.

3. Speech Difficulty

   • What it looks like: Speech may become slurred, words may be garbled, or the person may have sudden difficulty speaking or understanding simple sentences. (You can test this by asking them to repeat a simple phrase, like “The sky is blue.”)

4. Time to Call Emergency Services

   • The action: If you observe any of these signs—even if they go away—call emergency services immediately. Note the exact time the symptoms first appeared, as this helps doctors determine the best treatment options.

Additional Warning Signs

5. Sudden Confusion or Trouble Comprehending

   • What it feels/looks like: Sudden mental fog, disorientation, trouble understanding speech, or an inability to process what people are saying.

6. Sudden Trouble Seeing in One or Both Eyes

   • What it looks like: Blurred vision, sudden double vision, or a partial-to-complete loss of vision in one or both eyes that comes on rapidly.

7. Sudden Trouble Walking, Dizziness, or Loss of Balance

   • What it looks like: A sudden, unexplained loss of balance, unsteadiness, stumbling, or a feeling of severe dizziness (vertigo) combined with a lack of coordination.

8. Sudden, Severe Headache with No Known Cause

   • What it feels like: A blinding, intensely painful “thunderclap” headache that hits out of nowhere, often described as the worst headache of the person’s life. This is particularly common in hemorrhagic strokes (bleeding in the brain).

9. Sudden Numbness or Tingling on One Side of the Body

   • What it looks like: A sudden loss of sensation, “pins and needles,” or numbness affecting the face, arm, or leg, typically confined to one entire side (left or right) of the body.

10. Sudden Weakness or Paralysis of a Limb or Side

    • What it looks like: Beyond just a weak grip, an entire leg or arm may suddenly feel heavy, dead weight, or entirely paralyzed.