Cerebral infarction is a disease with a very high clinical incidence, and the aura of cerebral infarction has several relatively distinctive features: 1. the sudden appearance of a crooked mouth, recovering after 3 minutes or 5 minutes, which is a classic symptom of the face of vascular disease; 2. the sudden appearance of numbness in one limb, such as the left upper limb or lower limb, or unilateral upper limb or unilateral lower limb numbness, recovering after 5 minutes or 10 minutes, especially if it occurs repeatedly within 1 day. Some patients occur once in 1 day, and the chance of cerebral infarction in such patients is very high; 3. Sudden weakness of one limb, sudden lack of strength when walking, sudden fall, and recovery after a few minutes is also a very important precursor of vascular disease; 4. Sudden darkness of the patient’s eyes, which is also a very important precursor of vascular disease. The patient’s facial and lateral limb symptoms and signs are all very important precursors of vascular disease. Many patients with numbness in the extremities or numbness in both upper extremities are not a precursor of vascular disease because vascular disease is a symptom of one upper and lower extremity, not both. In addition, there are many patients who have numbness in one finger is also not a precursor of vascular disease, vascular disease must be lateralized, the whole hand or the whole upper and lower extremities. The initial judgment can be made by some signs and symptoms.