Cerebral insufficiency is a local blood supply deficiency in the human brain that causes brain dysfunction. Clinically, cerebral insufficiency is divided into acute and chronic cerebral insufficiency, which is common in the elderly, but with the development of society nowadays, more and more young people also suffer from this disease. The cause of cerebral insufficiency is related to cerebral atherosclerosis. So, what are the signs of cerebral insufficiency? 1, dizziness, especially sudden vertigo. 2, numbness of the limbs, suddenly feel numbness on one side of the face or hands and feet, some for tongue numbness, lip numbness. 3.Temporary slurred speech or speechlessness. 4.Limb weakness or inability to move. 5.Headache that is different from usual. 6.Sudden unexplained fall or fainting. 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 – drowsy state. 11.Involuntary twitching of the side or a limb. 12.Sudden but temporary onset of blurred vision. Loss of consciousness or mental deterioration, or even loss of normal judgment, all of which are related to insufficient blood supply to the brain.