When standing up with symptoms of dizziness and dangling, we have to consider the presence of a disease like postural hypotension. Some patients with autonomic impairment are unable to counteract venous blood stasis when standing up, usually through increased heart rate, increased myocardial contractility and arteriovenous systolic regulation to maintain blood pressure. In clinical practice, if the systolic blood pressure decreases by at least 20 mmHg and diastolic blood pressure decreases by at least 10 mmHg within 3 minutes of standing, and there are symptoms of cerebral hypoperfusion, including lightheadedness, dizziness, blurred vision, weakness, fatigue, cognitive impairment, pain in the back of the neck, and eventually sometimes transient loss of consciousness or syncope, it is called postural hypotension. Such a patient will not have symptoms when lying down, but the symptoms will occur immediately after standing upright, and will be relieved immediately after sitting or lying down.