The onset of cerebral infarction is also not age-specific, but is related to the site of infarction, with function being affected within the area of brain tissue divided by the infarction, and cerebral infarction in the elderly presenting in the same way as brain stem infarction in other age groups. Prehospital and lay people use the FAST score to see if a brain infarction is present. For example, F is face, look at the face, see whether the corners of the mouth are crooked, whether the mouth flows, whether the tongue is partial, whether the eyelids have drooping, whether the nasolabial folds become shallow, etc.; A is arm, whether there are limbs not only refers to the upper limbs, also includes the lower limbs whether there are limb movement disorders, numbness; S, refers to speech, that is, whether there is language disorder, whether the language is ambiguous; T in FAST is time, the onset time It is very important to provide the patient’s onset characteristics to the professional medical staff. Because thrombolysis can be carried out within the time window of onset, occlusion caused by large vessels can be carried out to retrieve embolism.