Cerebral hypoxia in the elderly can generally be categorized into acute hypoxia and chronic hypoxia. Symptoms of acute hypoxia include impaired consciousness, etc. Symptoms of chronic hypoxia include dizziness and memory loss. The more common cause of acute cerebral hypoxia is asphyxia, such as drowning or carbon monoxide poisoning, and the patient will soon develop impaired consciousness and quickly enter a coma. If the hypoxia cannot be corrected in time, the patient’s life will soon be in danger. For chronic cerebral hypoxia, the more common reason is that the elderly have serious atherosclerosis, poor blood vessel elasticity, slow blood flow, resulting in a decrease in oxygen-carrying capacity, and there will be a chronic hypoxic process of brain cells. Dizziness, daytime sleepiness, memory loss, and shallow sleep at night will usually occur. Once the old man appears the situation of cerebral hypoxia, must go to the regular hospital in time for relevant examination, cooperate with the doctor active treatment.