Recently, the weather has been hot and cold, and the elderly at home often complain of headaches, but they have been insisting on taking some painkillers and do not want to go to the hospital for examination. Is it because of insufficient blood supply to the brain? Symptoms of insufficient blood supply to the brain 1, motor nerve function failure This type of symptoms are the most common. Due to insufficient blood supply to the brain, the nerves in charge of the body’s motor function fail to function, common symptoms such as sudden mouth distortion, salivation, difficulty speaking, slurred speech, aphasia or incoherence, difficulty swallowing, weakness or inactivity of one side of the limb, falling down, walking unsteadily or suddenly falling, and some limb spasms or jumping. 2.Sensory dysfunction Due to the lack of blood supply to the brain and affect the analysis area of the brain, sensory organs and sensory nerve fibers, often manifested as facial numbness, tongue numbness, lip numbness and one side of the limb numbness or foreign body sensation; some into the blurred vision, or even sudden momentary blindness; many people have a sudden sense of vertigo; some limbs spontaneous pain; others suddenly appear tinnitus, hearing loss, etc.. 3, abnormal mental consciousness Such as always want to sleep, drowsy all day long, not due to overexertion, but the precursor signs of insufficient blood supply to the brain. Some people also show insomnia, some people have some changes in personality, such as solipsism, silence or indifference in expression, and some are multilingual and impatient; some can have transient loss of consciousness or mental decline, or even loss of normal judgment, which are all related to cerebral blood supply deficiency.