If the blood pressure reaches 140/90mmHg for a short period of time there is generally no danger, while long-term blood pressure at 140/90mmHg may cause some damage to the heart, brain, kidneys and other organs. The normal blood pressure in human is 90-140mmHg systolic and 60-90mmHg diastolic, so 140/90mmHg is the highest value of normal blood pressure. Elevated blood pressure is directly related to the incidence of cardiovascular and cerebrovascular events, and normal people should keep their blood pressure around 120/80mmHg. Although the blood pressure is normal, but at the upper limit of normal, the rate of increase of cardiovascular events increases by more than 20%. Therefore, if blood pressure is generally found to be at the high end of the normal range of blood pressure, it is necessary to pay close attention to frequent monitoring of blood pressure, improve lifestyle to avoid staying up late, improve work and rest, quit smoking and drinking, and eat a low-salt diet, while appropriately increasing moderate-intensity exercise to bring blood pressure down to 120/80 mmHg to avoid damage to target organs.