Blood pressure DIA means diastolic blood pressure and blood pressure includes both systolic and diastolic blood pressure. For normal adults, the normal value of blood pressure is less than 140/90 mmHg, while the high value of normal blood pressure refers to systolic blood pressure between 120-139 mmHg and diastolic blood pressure between 80-89 mmHg, and the normal ideal blood pressure refers to less than 120/80 mmHg. The letters SYS in blood pressure refer to systolic blood pressure, while DIA refers to diastolic blood pressure, referring to high and low pressure, respectively. and low pressure, respectively. The rise of blood pressure is often affected by many factors. It is recommended to have a low salt and low fat diet, to stop smoking and limit alcohol, to exercise properly, to maintain an optimistic and positive attitude towards life, and to pay attention to regular monitoring of blood pressure, blood lipids and blood sugar.