Hypotension is a lower than normal arterial blood pressure in the body circulation. Syncope is a transient loss of consciousness, which is a temporary state of loss of consciousness caused by a temporary insufficient supply of blood to the brain. Hypotensive syncope is due to the onset of syncope caused by insufficient cerebral blood supply due to hypotension. The causes of hypotension include physical weakness, malnutrition, blood volume insufficiency, chronic wasting disease, endocrine metabolic disease, cardiovascular disease, neurological disease, etc. It can also be seen in physiological factors. For example, body position, pregnancy, emotional excitement and so on. In severe cases, it can lead to syncope. In order to prevent syncope caused by low blood pressure, patients with symptoms of dizziness should consult a doctor in a timely manner, do not aerial or other dangerous work.