There are generally two peaks in blood pressure during the day, with the first peak occurring in the morning between six and ten o’clock, and the second peak occurring between sixteen and eighteen o’clock in the afternoon. However, there are individual differences. Blood pressure is simply the pressure exerted on the walls of blood vessels by the flow of blood through them. The pressure created by the heart contracting to push blood through the blood vessels is systolic pressure; the pressure on the walls of the arteries to keep the blood flowing when the heart is in diastole is diastolic pressure. Generally speaking, a normal person’s blood pressure will have two peaks every day, the first peak occurs in the morning from six to ten o’clock. Early in the morning the body’s sympathetic nerves are excited, and under the action of the sympathetic nerves, the phenomenon of elevated blood pressure and increased heart rate occurs. Many cardiovascular and cerebrovascular diseases such as heart attack and cerebral hemorrhage are prone to attack at this time, which is closely related to the relationship between elevated blood pressure in the morning. The second peak generally occurs from 16:00 to 18:00 in the afternoon, when some people will feel fatigue, neck pain, dizziness and so on due to elevated blood pressure. However, it should be noted that there may be individual differences in the occurrence of the above blood pressure peaks. If the fluctuation pattern of blood pressure needs to be clarified, 24-hour ambulatory blood pressure monitoring is recommended to guide the use of medication. Specific treatment should be in accordance with medical advice.