A high pressure of 120mmHg and a low pressure of 60mmHg fall within the normal range of blood pressure fluctuations. Normal blood pressure fluctuation range indicator is systolic blood pressure 90-139mmHg, diastolic blood pressure 60-89mmHg. If the systolic blood pressure is more than 140mmHg and diastolic blood pressure is more than 90mmHg, it can be called the blood pressure is increased. If the systolic blood pressure is less than 90 mmHg and the diastolic blood pressure is less than 60 mmHg, it can be called low diastolic blood pressure. It is important to understand the range of normal blood pressure fluctuations and pay attention to monitoring blood pressure so that abnormal blood pressure can be detected and treated in a timely manner.