The FAST in the Brain principle aims to quickly recognize a stroke in order to buy time for stroke resuscitation. F stands for Face, which refers to whether there is a side of the face of the mouth crooked, or facial numbness, weakness. A stands for Arm, which refers to whether there is weakness of the upper limbs, you can let the patient double upper limbs lifting, to see whether there is one side of the limbs of the strength is poor, can not be lifted or grip strength is poor. S stands for Speech, to see whether the patient has difficulty in speaking and speech comprehension or pronunciation of the problem. T stands for Time, designed to emphasize the time, emphasize the thrombolytic time window. T is for Time, which is designed to emphasize the time, the time to save the stroke, the thrombolytic time window. Within the thrombolytic time window, if contraindications are ruled out, thrombolytic therapy needs to be considered. Of course, thrombolysis has certain risks, and the patient’s family needs to be fully informed and consent sought. In addition, active treatment of stroke is conducive to reducing brain cell damage, which is conducive to the recovery and prognosis of the disease.