It is possible to eat breakfast when measuring blood pressure, and blood pressure can be measured at any time. If the patient does not have abnormal blood pressure or hypertension, as long as the measurement is made at rest, it should be within the standard range, and eating will not cause the patient to develop high blood pressure. If the patient’s blood pressure rises after eating, it is possible that the patient may have hypertension. If so, it is recommended that the patient undergo ambulatory blood pressure monitoring, which can objectively assess the patient’s overall blood pressure over a 24-hour period, and help to determine whether the patient has hypertension or abnormal blood pressure. When measuring blood pressure, it is recommended that the patient must remain in a resting state. If the patient has just been active or has gone up the stairs, it is best to rest for at least 5 minutes before taking the measurement, as the reliability of the measured value will be higher.