The causes of high low pressure are as follows: 1, age factor, patients with increased blood pressure are usually mainly middle-aged, while high pressure is mainly in the elderly. 2, also closely related to lifestyle, smoking, alcohol abuse, poor dietary structure, such as high salt, high fat, high sugar diet, or often stay up late, excessive mental tension, excessive stress, insufficient rest and sleep, are prone to the occurrence of increased low pressure. 3, family A history of genetic disease, patients with familial hypertension, also prone to high low pressure. 4, coronary atherosclerotic heart disease appears hardening of the arteries, the emergence of poor vascular elasticity, increased brittleness, there will also be high low pressure situation.