For patients with sudden cerebral infarction, if they are in the hospital, they first need to be diagnosed by head CT examination, and if they are confirmed to have acute cerebral infarction, they should receive oxygen in time, control blood pressure, and carry out thrombolytic therapy for patients with indications. If it is a sudden cerebral infarction at home or outside the hospital, the first aid measures are as follows: 1. keep the airway open: if the patient is unconscious, move the patient to an open and safe area, loosen the patient’s collar and belt, and if there is vomiting, the patient’s head should be tilted to the side to avoid accidental inhalation of vomit; 2. oxygen inhalation: if available, the patient should be given oxygen inhalation to improve respiratory function; 3. blood pressure measurement: measure the patient’s blood pressure, and patients with previous Patients with hypertension may always have antihypertensive drugs at home, and patients who are conscious can take antihypertensive drugs to control their blood pressure; 4. Call emergency: at the first time when the patient has a cerebral infarction, he should call 120 emergency number and send the patient to a nearby hospital for treatment through professionals in a timely manner. Some patients with cerebral infarction can have precursor symptoms before the onset of the disease, such as paroxysmal dizziness, headache, limb weakness, etc. They should be alert when these symptoms appear and go to the hospital in time. Patients with high blood pressure, high blood lipids and high blood sugar should pay attention to monitoring blood pressure, blood lipids and blood sugar to keep them within a reasonable range. A light diet, regular work and rest, and proper exercise can reduce the incidence of cerebral infarction to a certain extent.