Primary hypertension occurs as a result of the interaction of genetic and environmental factors, and poor lifestyle plays an important role. Some of these are unchangeable risk factors, such as age and genetic factors. Statistics show that 65% of people aged 65-74 years have hypertension, 75% of people aged 75-84 years have hypertension, and 95% of people aged 85 years or older have hypertension. This indicates that the prevalence of hypertension increases with increasing age. Genetic factors play a very important role in the development of hypertension, there is also a data: both parents do not have hypertension, only 3.1% of children suffer from hypertension, one parent has hypertension, the prevalence of children will reach 28.3%, both parents have hypertension, the prevalence of children rose to 46%. However, some other risk factors can be changed through their own efforts, thus avoiding the occurrence of hypertension or reducing the development of the disease. 1, overweight, obesity overweight, obesity is an important risk factor for increased blood pressure, weight loss 5-7%, can make blood pressure drop 10-20mmHg. obesity degree can be measured by body mass index (BMI) Lei: BMI = weight (kg) / height (meters squared). Normal 18.5-23.9, overweight 24-27.9, obese R28. 2, high salt diet The average daily intake of sodium in our population per 1 gram, can make the population average systolic blood pressure increased by 2mmHg, diastolic blood pressure rose 1.7mmHg. but not everyone in the diet more salt will cause hypertension, in the population of about 20% of people eat more salt will get hypertension, medically known as salt-sensitive patients. For those who already have hypertension, salt restriction is also beneficial for lowering blood pressure. At present, it is advocated that the daily intake per person should be less than 6 grams. 3, unreasonable diet unreasonable diet can cause obesity and high blood fat, which can also cause hypertension. A reasonable diet should not eat too much, especially high calorie food; eat more fresh vegetables and fruits, reduce dietary fat, moderate increase in quality protein such as fish, poultry, lean meat, more beans and their products. 4, long-term excessive alcohol consumption Large amounts of alcohol can cause hypertension, the amount of alcohol consumption and blood pressure levels are directly proportional to the relationship. It is estimated that about 5-10% of hypertensive patients are caused by drinking. It is currently believed that hypertension caused by alcohol consumption is reversible, and that by simply abstaining from alcohol, the blood pressure of this group of people can fall or return to normal. About 13 million people in China’s hypertension can be reduced by quitting alcohol, thus not requiring drug treatment. 5, smoking A scholar in the United States on 40,000 people followed up for 11 years found that smokers than non-smokers occur as much as 2.5 times higher hypertension, smoking a cigarette can make the systolic blood pressure rise 10-25mmHg. 6, lack of physical activity Regular physical activity can prevent and control hypertension. As early as 1933, someone found this phenomenon: walking, jogging, swimming, cycling are aerobic exercise is good for health. 7, long-term mental tension Long-term mental tension is prone to hypertension, should self-reduce mental stress, maintain a balanced psychological. We change these modifiable risk factors, then the prevalence of hypertension can be reduced, if already suffering from hypertension, with the cooperation of drug therapy, blood pressure is also more likely to meet the standard.