Hypertension refers to high diastolic blood pressure, which is defined as a diastolic blood pressure ≥ 90 mmHg on at least three non-same day measurements using standard measurement methods under quiet, awake, and non-antihypertensive conditions. pure diastolic hypertension is mainly related to poor lifestyle and psychosomatic factors, due to increased sympathetic nerve activity and increased peripheral vascular resistance. Diastolic hypertension alone is common in young and middle-aged hypertensive male patients aged 20 to 50 years, mostly with insidious onset and reduced pulse pressure, accompanied by weight gain. These patients often have poor lifestyles such as high work stress, mental tension, long working hours, obesity, alcohol consumption, smoking, sedentary lifestyle, and high salt diet. Blood pressure formation depends on the elasticity of large blood vessels, the contractility of the heart, the viscosity of blood, and peripheral vascular resistance. Heart contraction forms systolic pressure, large artery retraction forms diastolic pressure, and the most important factor affecting diastolic pressure is peripheral vascular resistance. Due to poor lifestyle and psychosomatic factors causing increased sympathetic nerve activity in patients, the caliber of resistance vessels becomes smaller and the amount of pressure-raising substances increases, resulting in increased peripheral vascular resistance and leading to increased diastolic blood pressure. The main hemodynamic feature of diastolic hypertension is increased peripheral vascular resistance with normal cardiac output. Diastolic hypertension alone should also be treated promptly or it will develop into classic hypertension. Treatment should be based on lifestyle interventions, supplemented by antihypertensive medications.