The dangers of low pressure differential mainly lead to insufficient blood supply to organs, which causes clinical manifestations in the corresponding organs. Insufficient blood supply to the brain may manifest as dizziness and fatigue. Inadequate blood supply to the heart may be manifested by palpitations, shortness of breath, and pallor. Insufficient blood supply to the digestive organs may manifest as anorexia, loss of appetite and indigestion, etc. Differential pressure is the pulse pressure, pulse pressure refers to the difference between systolic and diastolic blood pressure, the normal value is 30-40mmHg. If the value is lower than 30mmHg, then the pulse pressure is reduced, systolic blood pressure is reduced or diastolic blood pressure is increased will lead to a decrease in pulse pressure. Reduced myocardial contractility or reduced cardiac output will result in lower systolic pressure, and increased peripheral vascular resistance or increased heart rate will result in higher diastolic pressure, mostly seen in patients with shock, anemia, pericardial effusion, constrictive pericarditis, severe mitral or aortic stenosis, congestive heart failure, and also seen in people who are obese, alcoholic, and mentally stressed.