Blood pressure can also be high without eating. Occasionally, not eating and being in a severe state of hunger can cause sympathetic excitement and an increase in heart rate, which in turn can cause an increase in blood pressure. If you don’t eat properly for a long time and don’t drink water, your blood pressure will gradually drop if your blood volume is seriously insufficient. But for a patient with high blood pressure, you should never make your blood pressure drop by not eating, but you should develop good living and eating habits. Low-salt diet, increase physical exercise, appropriate increase of food with high potassium content, eat more fresh vegetables and fruits, quit smoking and limit alcohol. If necessary, you can apply antihypertensive drugs, commonly used antihypertensive drugs are nifedipine, amlodipine, irbesartan, hydrochlorothiazide, and for men with combined prostate enlargement, terazosin can be used.