Low pressure refers to diastolic blood pressure, high pressure refers to systolic blood pressure, diastolic blood pressure 75mmHg, systolic blood pressure 135mmHg is not considered to be a large pressure difference, but is in the critical value, may be related to exercise, atherosclerosis and other reasons. Differential pressure refers to the pulse pressure difference, that is, the difference between the systolic pressure and diastolic pressure, under normal circumstances should be 30 ~ 40mmHg, and the pulse pressure difference is more than 60mmHg, but diastolic pressure 75mmHg, systolic blood pressure 135mmHg between the pulse pressure difference is exactly 60mmHg, so it is not considered to be a large difference in pulse pressure, in the pulse pressure difference in the critical value. There are many reasons for a pulse pressure difference of 60mmHg, which may be caused by physiological factors, such as exercise, ageing, etc. Generally, it does not have a great impact on health, but it is necessary to regularly monitor the changes in blood pressure. In addition to this, it may also be caused by diseases such as atherosclerosis, hyperthyroidism, aortic insufficiency and so on. It is recommended that people with diastolic blood pressure of 75mmHg and systolic blood pressure of 135mmHg go to the hospital to improve the relevant examinations and clarify the specific causes.