You can use the letters in F.A.S.T. to detect a stroke.
F = Face Drooping – Does one side of the face droop or is it numb? Ask the person to smile. Is the person’s smile uneven?
A = Arm Weakness – Is one arm weak or numb? Ask the person to raise both arms. Does one arm drift downward?
S = Speech Difficulty – Is speech slurred?
T = Time to call 911
Source: https://www.stroke.org/en/about-stroke/stroke-symptoms
