The symptoms of cerebral blood supply deficiency are summarized in the following aspects: 1. dizziness, especially sudden dizziness. 2. 2, numbness of the limbs, suddenly feeling numbness on one side of the face or hands and feet, some for tongue numbness, lip numbness. 3.Temporary slurred speech or poor speech. 4.Limb weakness or inability to move. 5.Headache that is different from usual. 6.Sudden fall or fainting of unknown origin. 7.Sudden loss of consciousness or sudden change in personality and intelligence. 8.Significant general weakness and limb weakness. 9.Nausea and vomiting or fluctuation of blood pressure. 10.Drowsy desire to sleep all day – drowsy state. 11.Patients with cerebral blood supply deficiency have involuntary twitching on one side or one limb. 12.Patients with sudden but temporary blurred vision.