The cause of high blood pressure and low blood pressure is mainly the increase of vascular resistance of peripheral vascular resistance and the increase of diastolic blood pressure. 1. The etiology of primary elevated diastolic blood pressure and secondary elevated diastolic blood pressure are different. Primary elevated diastolic blood pressure is mostly related to heredity, environment, lifestyle, etc., while secondary elevated diastolic blood pressure is mostly caused by certain diseases, such as renal disease, endocrine disease, cardiovascular disease, cranial and cerebral disease. 2. Drugs such as glucocorticoids, ephedrine, contraceptives and non-steroidal anti-inflammatory drugs can also lead to secondary elevation of diastolic blood pressure, and mental tension, anger, worry, and stimulation of the environment can lead to elevation of low pressure. Therefore to have a healthy body, it is very important to maintain a healthy lifestyle. Reasonable diet, appropriate limitation of sodium and fat intake to increase the intake of vegetables and fruits, do not smoke, adhere to a moderate amount of physical activity, abstain from alcohol to maintain a normal body weight, overweight and obese people should lose weight, a reasonable balance of healthy lifestyle for the prevention of hypertension and assist in the treatment of high blood pressure is very favorable. If there is any maladaptation, consult a doctor in time to avoid delaying the condition.