We often encounter patients in outpatient clinics and wards who have delayed treatment because they do not know the early warning symptoms of stroke. There are five warning signs of stroke to remember: 1) sudden numbness or weakness of one side of the face or limb; 2) sudden blurred vision or blindness, especially unilateral; 3) sudden aphasia, difficulty speaking or understanding language; 4) sudden severe, unexplained headache; 5) sudden unexplained dizziness, unsteady walking or sudden fall, especially when accompanied by any of the above symptoms; The duration of the above symptoms may be as short as a few seconds. However, regardless of the duration, as long as the symptoms occur, you should consult the neurology or emergency department promptly, and should not ignore the symptoms because they are mild or short-lived, and should not wait at home by chance, thus missing the best time for treatment.