Most people measure blood pressure in the morning or afternoon is the most appropriate and accurate, but because human blood pressure is constantly fluctuating, so other time periods can also measure blood pressure, you can choose the measurement time according to the change of the law of blood pressure. Human blood pressure is always fluctuating, normal people’s blood pressure has a peak in the morning after waking up, in the afternoon again a peak, the lowest blood pressure in the early hours of the morning, so to assess the blood pressure situation, usually choose the two peak time periods. Since it is convenient to measure at home, most people most often choose the morning when they first wake up, open their eyes after urinating, and can choose to sit or lie down for standardized measurement. If this time period is not convenient, you can also choose other time periods, such as after waking up from a nap, or you can choose other time periods with high blood pressure to measure according to the fluctuation of blood pressure. If you need to compare daily blood pressure changes, it is best to choose the same time period each day for measurement. It is recommended to seek medical attention and treatment according to doctor’s advice if you find any problem of elevated blood pressure.