When lying down suddenly stand up will have black in front of the eyes or even coma, this is due to sudden ischemia and hypoxia of the brain, in addition when the body is anemic, malnutrition, resistance to decline, there will also be stand up after the symptoms of black in front of the eyes, it is recommended to strengthen physical exercise, appropriate supplementation of iron ions, which can indirectly play a role in replenishing blood. Daily nutrition balance, do not picky food, eat more fresh fruits and vegetables. Both the elderly and young people will have some symptoms of dizziness when they stand up suddenly, so it is recommended to get up slowly, squat slowly and not to move too fast. If these methods do not work well, then it is recommended to go to the hospital to perform a head CT examination to exclude the above symptoms caused by other disorders and to confirm the diagnosis in time to avoid delaying treatment.