Decreased pulse pressure is a condition in which the difference between systolic and diastolic blood pressure is less than 20 mmHg. In actual clinical practice, the common diseases that can trigger the reduced pulse pressure are severe mitral stenosis, aortic stenosis and constrictive pericarditis, large accumulation of fluid in the pericardium; there are also patients who may be in shock or severe heart failure, which can also lead to reduced pulse pressure; there are also patients who may have reduced pulse pressure due to hyperlipidemia, diabetes or due to obesity. It is recommended that when patients find a decrease in pulse pressure, they should first identify the cause, and if no disease causing the decrease in pulse pressure is eventually found, they should pay attention to regular blood pressure monitoring.