When blood pressure is measured when you are nervous, your blood pressure will be higher than the normal state. Human blood pressure is affected by many factors, such as emotional excitement, excessive tension, strenuous exercise, and after eating, all of which can cause an increase in blood pressure. When people are stressed, they excite the sympathetic nerves and release large amounts of catecholamines, which have a vasoconstrictive and elevating effect, so the blood pressure measured when stressed is not accurate and does not reflect the true blood pressure value. When measuring blood pressure, people should rest quietly for at least 5-10 minutes, avoid excessive tension and emotional excitement, avoid drinking strong tea, and avoid strenuous exercise, so that the blood pressure measured can be more accurate.