Anger can cause violent mood swings and nerve excitation, which can have an effect on blood pressure. A short period of violent mood swings can also cause a short period of elevated blood pressure, mainly due to the activation of the sympathetic nervous system at that time, the sympathetic nerves are in a state of excitement, catecholamine secretion increases, so that the peripheral resistance of blood vessels increases, causing an increase in blood pressure. Therefore, when measuring blood pressure, the test subject is required to rest quietly for 5 minutes and avoid drinking coffee and strong tea before measuring blood pressure. If the blood pressure fluctuates too much, three measurements can be taken to take the average value to minimize the effect of measurement error. If multiple measurements of blood pressure are abnormal, it is recommended to consult a doctor in time, follow the doctor’s instructions for further examination, clarify the cause with the help of the doctor, and carry out targeted treatment or therapy.