In general, normal people usually have higher blood pressure between 6 and 10 o’clock and between 16 and 20 o’clock in a day, and the exact time varies from person to person, and there is no uniform time for the highest blood pressure. Blood pressure is the lateral pressure acting on the wall of the blood vessel per unit area when blood flows in the blood vessel, generally including diastolic and systolic pressure, the normal value of systolic blood pressure is generally 90 to 139 mmHg, and the normal value of diastolic blood pressure is 60 to 89 mmHg. Generally speaking, normal people’s blood pressure is usually higher during 6 to 10 o’clock and 16 to 20 o’clock in a day. This is because blood pressure is affected by various factors such as environment, emotion, exercise, sleep and medication, etc., and there is no need to worry as long as the blood pressure is within the normal range. It is worth noting that when the blood pressure is out of the normal range, it should be taken seriously, and the cause should be clarified by seeking medical treatment in a timely manner.