Hypertension is defined as systolic blood pressure ≥ 140 mmhg and/or diastolic blood pressure ≥ 90 mmhg. Common symptoms include headache, dizziness, tight neck, fatigue, palpitations, etc. Third, blood pressure fluctuates greatly with the season, day and night, emotions, activity level and other factors. For example: blood pressure is higher in winter and lower in summer; blood pressure is generally lower at night and rises rapidly in the morning after waking up and activity, forming a peak blood pressure in the morning. Fourth, precautions: 1, avoid emotional excitement anxiety, sadness, worry, anxiety and other bad emotions and tension and fatigue, easy to cause systemic vasoconstriction, heart rate increases, blood pressure rises. You can listen to music and read pictorials. 2, avoid excessive fatigue excessive fatigue can aggravate hypertension, should maintain adequate sleep and reasonable exercise, such as walking and playing Tai Chi, etc.. Do not strenuous exercise, rapid change of position 3, avoid eating too much diet is easy to cause indigestion, while the diaphragm moved up because of over-eating, affecting the normal activities of the heart and lungs. At the same time, excessive drinking, especially strong alcohol will make blood pressure rise. 4, avoid taking drugs indiscriminately hypertension patients according to different conditions and individual differences, the treatment of drugs are different. Should be in accordance with medical advice, on time, according to the amount of medication, 5, avoid dry stool constipated people have to hold their breath when relieving stool, so that the blood pressure will rise sharply, relaxed when the blood pressure fell sharply, it is easy to cause a stroke and myocardial infarction, so should keep the stool smooth. Fifth, the diet of patients with hypertension: 1, diet: three meals a day, regular and quantitative, not too hungry, not overeating. 2, balanced diet: a variety of food with a reasonable, balanced diet. 3, scientific drinking water: try to drink hard water, such as spring water, deep well water, natural mineral water, etc. 4, diet should be light: diet should be light, high vitamin, high fiber, high calcium, low fat, low cholesterol diet. It is recommended to eat more coarse grains, mixed grains, fresh vegetables, milk, fruits, soy products, lean meat, fish, chicken and other foods. It is recommended to eat vegetable oil, less lard, greasy food and white sugar, spicy, strong tea, coffee, etc. 5, reduce the amount of salt: the daily amount of salt is controlled within 2-5 grams.