Blood pressure will increase when hungry, mainly because in the case of hunger, hunger will reflexively stimulate sympathetic nerve overexcitation, and the release of catecholamines from sympathetic nerve endings will increase, resulting in higher blood pressure and faster heart rate, with clinical manifestations such as panic, chest tightness, dizziness, weakness and sweating, and in severe cases, lower blood sugar. After glucose input or rest after eating, blood pressure and heart rate will return to normal levels, and the uncomfortable symptoms will be gradually relieved. If you have previous hypertension, coronary heart disease, or the elderly encounter this situation, you must promptly seek medical attention for further examination or hospitalization to avoid aggravation of the condition due to hunger and adverse stimuli. Maintain good habits, eat regularly, do not overeat, do not starve and eat again, do these are very important to maintain stable blood pressure.