Chapter 2: The Most Important Warning Sign Is Sudden Change
One of the most important words when discussing stroke symptoms is sudden.
A person may suddenly develop weakness in one arm.
Their face may suddenly appear uneven.
Their speech may suddenly become strange or difficult to understand.
Their vision may suddenly become blurry or disappear in one eye.
They may suddenly become extremely dizzy or have difficulty walking.
These symptoms should not be dismissed simply because the person has never experienced a neurological problem before.
A commonly used tool for remembering major stroke symptoms is FAST.
F — Face: Ask the person to smile. Does one side of the face droop?
A — Arms: Ask them to raise both arms. Does one arm drift downward or feel significantly weaker?
S — Speech: Ask them to repeat a simple sentence. Is their speech slurred, confused, or difficult to understand?
T — Time: If these symptoms appear suddenly, seek emergency medical help immediately.
FAST does not identify every possible stroke symptom, but it provides a simple way to recognize several major ones.
Other symptoms can include sudden numbness or weakness, particularly on one side of the body.
A person may also suddenly have trouble understanding language, become confused, develop a severe unexplained headache, lose coordination, or experience difficulty seeing.
Not every stroke looks exactly the same.
The location of the brain affected by the stroke can influence the symptoms.
This is why a person should not wait for every classic symptom to appear before seeking help.
For example, someone with sudden vision loss should not assume they are safe simply because their face looks normal and both arms are strong.
Likewise, sudden severe dizziness accompanied by difficulty walking or other neurological symptoms should be evaluated urgently.
The most important point is that stroke treatment is time-dependent.
Some ischemic strokes can be treated with clot-busting medication or mechanical thrombectomy in appropriate patients, but eligibility depends on factors including when symptoms began and what imaging shows.
Waiting at home to see whether symptoms disappear can reduce treatment options.
If you suspect a stroke, remember the time the symptoms started—or the last time the person was known to be normal—and contact emergency medical services.
Do not drive the person yourself if emergency services are available.