Increased sympathetic excitability can cause an increase in blood pressure, and with sympathetic excitation can lead to an increase in heart rate and increased myocardial contraction, which can lead to an increase in cardiac output. Increased sympathetic excitability also causes an increase in the secretion of catecholamines and other hormones in the blood, which can lead to an increase in blood pressure through these mechanisms. Usually, mental tension, emotional excitement, and strenuous exercise are all situations where sympathetic excitability increases, and these situations can cause a significant increase in blood pressure. Therefore, patients with hypertension should avoid factors that cause significant sympathetic excitation to prevent significant fluctuations in blood pressure, so as to avoid adverse consequences that are detrimental to patients with hypertension.