Most of the low blood pressure and high blood pressure are due to high salt diet, obesity, long-term mental stress, poor living habits and so on. 1. High salt diet:Patients with high salt diet will increase water intake, due to the increased osmotic pressure of intravascular crystals, so the water enters the blood vessels, resulting in increased blood volume and elevated diastolic blood pressure. 2. Obesity: capillaries are an important place for blood storage, obese patients’ body capillaries are pressurized, resulting in more blood flowing into the large blood vessels, resulting in high diastolic blood pressure, i.e., low pressure. 3. Long-term mental tension: long-term mental tension will lead to increased heart rate, activate the renin angiotensin system, resulting in vasoconstriction, elevated blood pressure, mainly diastolic blood pressure. 4. Bad lifestyle habits: Bad habits here mainly include staying up late, smoking, alcoholism, etc., and such patients will also have elevated low blood pressure. It is recommended that patients prefer to adjust their blood pressure by improving their lifestyle, such as weight loss, moderate exercise, relaxation, quitting smoking and alcohol, and ensuring the quality of sleep, etc. If you still can not control your blood pressure, please consult a doctor in time.