A sustained hypotensive state of 60/40 mmHg can be life-threatening, while transient postural hypotension is not life-threatening. The normal adult high pressure that is systolic blood pressure range is 90-140mmHg, low pressure that is diastolic blood pressure is range 60-90mmHg, only in the normal range of blood pressure, can meet the body organs of the blood flow supply. Persistent hypotension will have the following hazards: 1, ischemic-hypoxic encephalopathy due to insufficient blood supply to brain tissue, central respiratory depression, etc., appearing irritability, apathy or coma, blue face and lips, convulsions, etc. 2, insufficient blood supply to the heart due to myocardial ischemia, arrhythmia, heart failure, etc., appearing chest pain, palpitations, shortness of breath, dyspnea, telangiectatic breathing, coma, etc. 3, insufficient blood supply to the kidneys due to acute renal failure, Insufficient blood supply to other organs, generalized wet and cold, cold sweating, skin spots, etc.