Bid blood pressure measurement, is the time of 2 times / day blood pressure measurement. It is recommended that patients can be measured in the morning at rest, preferably after urination, and it is also important to note that during the measurement, patients remain at rest for at least 3-5 minutes. It is important to note that smoking is not allowed before the measurement of blood pressure, because these factors may cause an increase in blood pressure, the second blood pressure measurement, it is recommended that the patient is measured before bedtime, or measured in the afternoon, which will help to clarify whether the patient’s current blood pressure is relatively stable within 24 hours of control. If the patient is a person with normal blood pressure, his blood pressure should be within the standard range no matter what time of the day the measurement is taken. If the patient is currently taking antihypertensive medication, taking blood pressure measurements twice a day will help to roughly assess whether the antihypertensive medication currently being taken is reasonable, and whether the overall blood pressure control is stable.