The blood pressure of the human body is increased when it is hungry. When the body is hungry, the body’s heart rate tends to increase, which leads to an increase in blood pressure. The patient’s heart rate increases mainly because hunger will make the body in a state of stress, at this time the sympathetic nerve excitation, catecholamine and other substances to increase secretion. However, the body’s blood pressure tends to ease with the relief of hunger, so the body’s blood pressure level during hunger should not be used to represent the body’s usual blood pressure level, and there is no need to use antihypertensive drugs for antihypertensive treatment. For hypertensive patients, poor dietary habits such as overeating and irregular eating can lead to large fluctuations in blood pressure, resulting in poor blood pressure control, and also have an adverse effect on the progression of complications of hypertension such as atherosclerosis. Therefore, hypertensive patients should pay attention to regular diet, low salt and low fat diet in order to control their blood pressure smoothly.