If there is a symptom of blackness in front of the eyes when standing up, it may belong to upright hypotension. This is because when the body is lying down, the body’s volume is deficient. If you stand up violently, the body’s blood volume will be hoarded in the lower limbs from top to bottom, thus causing symptoms of ischemia and hypoxia, resulting in blackness in front of the eyes and even fainting. Once this happens, you need to lie down or lie on your back again, and if you have the conditions, you can take the treatment of oxygen. In addition there is a blood pressure meter at home to measure the blood pressure, if the blood pressure is low, you can temporarily drink some brown sugar water to increase the volume of the body. Also need to call 120 emergency number, wait for the arrival of medical personnel, go to the hospital for specific examination as well as treatment, so that the body can keep healthy.