Based on the results of 24-hour ambulatory blood pressure monitoring, medical experts categorize hypertensive patients into spoon-shaped blood pressure and non-spoon-shaped blood pressure, i.e., those who experience a drop in blood pressure during sleep at night are characterized as spoon-shaped blood pressure, and those who do not experience a drop are characterized as non-spoon-shaped blood pressure. The rate of blood pressure drop at night can also be used to indicate that when the rate of blood pressure drop at night is greater than 10%, it is designated as spoon-shaped blood pressure, while less than 10% is designated as non-spoon-shaped blood pressure. Hypertension can lead to a series of diseases of the heart, brain, kidneys and other vital organs, and the incidence and severity of these diseases are closely related to blood pressure, i.e., the higher the blood pressure, the more serious these diseases are. The severity of cardiovascular disease is more closely related to the average blood pressure obtained from 24-hour ambulatory blood pressure monitoring than to the even-sided blood pressure in the office. Many studies have demonstrated that patients with spoon-shaped hypertension have a much lower incidence of cardiovascular disease than those with nonspoon-shaped hypertension. It has been demonstrated that the rate of nocturnal blood pressure drop essentially reflects the absolute average nocturnal blood pressure, i.e., patients with nonspoon-shaped hypertension are actually a group of patients with elevated nocturnal blood pressure hypertension. Since the level of nocturnal blood pressure is closely related to cardio-cerebral and renal damage, it is important to pay attention to the smooth decline of blood pressure during the daytime, and even more attention should be paid to the control of nocturnal blood pressure.