The blood pressure standard is a systolic blood pressure of 90 to 139 mmHg and a diastolic blood pressure of 60 to 89 mmHg as normal values. A systolic blood pressure of ≥140mmHg or a diastolic blood pressure of ≥90mmHg is considered high blood pressure. Blood pressure below 90/60 mmHg is considered hypotensive. Normal systolic blood pressure for patients over 18 years of age is 90-139mmHg, diastolic blood pressure is 60-89mmHg, and pulse pressure is 30-40mmHg. Blood pressure values can help us determine heart function, diagnose disease, and observe changes in condition. Hypertension is diagnosed if the systolic blood pressure is ≥140mmHg or diastolic blood pressure is ≥90mmHg when the blood pressure is measured in the office 3 times on a non-drug-controlled basis on a non-simultaneous day. When arterial systolic blood pressure is less than 90 mmHg and diastolic blood pressure is less than 60 mmHg it can be referred to as hypotension or hypotensive state. If the patient has abnormal blood pressure values, if physiological factors are excluded, it is recommended that the patient go to the hospital in time to clarify the cause of the disease.