Squatting for too long and standing up with dizziness and black eyes is a condition known as upright hypotension. Upright hypotension easily occurs in the middle-aged and elderly, it is due to the vascular compliance response is not sensitive, resulting in insufficient blood perfusion in the blood vessels of the brain, resulting in temporary cerebral ischemia caused by some people even have syncope phenomenon, so upright hypotension and neurovascular regulation dysregulation has a great relationship. See for the above reasons, especially the elderly in the activities, position change to pay attention to slow movements, especially at night up, is to sit up slowly from the bed, and then sit in bed for 3 minutes after getting out of bed to go to the toilet to prevent fainting, the above situation is a physiological imbalance in regulation syndrome, not considered a disease. However, for patients with heart disease, long-term malnutrition, renal insufficiency, when upright hypotension occurs, it is necessary to go to the hospital for timely consultation to identify the cause and give treatment.