Blood pressure range for prehypertension Systolic blood pressure between 120-139 mmHg Diastolic blood pressure between 80-89 mmHg Suggestions Prehypertension is a state of hypertension that is located at a critical level but cannot be diagnosed as hypertension. However, the development of hypertension can be accelerated if the patient is in a long-term high sodium and low potassium diet, overweight and obesity, excessive alcohol consumption, mental stress and lifestyle such as age, family history of hypertension, and lack of physical activity. Therefore, it is recommended that this group of patients should actively improve their lifestyles and be controlled at an early stage of the disease. Specific recommendations for intervention are as follows: 1. Rational diet: follow the principles of low salt, high potassium, and high protein diet, ensure a variety of foods on a daily basis, limit sodium intake (including cooking salt, MSG, soy sauce, etc.), eat less preserved products, and ensure salt intake below 6g/d. At the same time, eat less sweets, drink less high-sugar drinks, and eat less animal offal, fatty meat, fish roe, egg yolk and other high-fat foods. In addition, potassium-rich foods (such as green vegetables, fresh fruits or beans) and fiber-rich whole grains can be added to the diet to maintain the stability of blood pressure levels; 2. Moderate exercise: usually control weight reasonably (BMI=18.5-23.0kg/m2), reduce sedentary time and strengthen exercise. Exercise intensity should be maintained at medium intensity, mainly aerobic training, such as walking, jogging, bicycling, swimming, tai chi, etc. If discomfort occurs during exercise, it is recommended to stop immediately to avoid adverse effects; 3, adjust lifestyle habits: quit smoking and limit alcohol, keep a regular work and rest schedule, avoid staying up late, strain, and should not drink coffee, strong tea and other beverages before bed; 4, maintain emotional stability: pay attention to adjust the mood, keep the body and mind relaxed, avoid tension, anger and other bad emotions, can listen to light music, confide and other ways to release emotions; 5, regular Blood pressure monitoring: regularly self-measure blood pressure or perform 24-hour ambulatory blood pressure monitoring. In addition to this, it is recommended to assess target organ damage, and if blood pressure is still not controlled, the patient can decide whether and when to start drug therapy according to his condition.