To determine whether you have high blood pressure, you can mainly use an upper arm electronic sphygmomanometer or mercury sphygmomanometer. The criteria for hypertension are systolic blood pressure greater than or equal to 140mmHg and/or diastolic blood pressure greater than or equal to 90mmHg. When patients suspect that they have hypertension, they need to measure their blood pressure repeatedly. If the blood pressure rises only once in a while, it is not effective in determining hypertension. Instead, the criteria for determining high blood pressure need to measure the blood pressure at different times, and if the blood pressure rises more than three times in a row, then the diagnosis of hypertension can be confirmed. The treatment of hypertension is strict and requires the patient to be in a quiet state. If the patient in the exercise or after drinking, measuring blood pressure may lead to high blood pressure, measured blood pressure can not be judged as hypertension disease, only to avoid these factors, the patient in a quiet state of rest, the blood pressure is still more than 140/90mmHg, can be diagnosed as hypertension. When abnormal blood pressure occurs, it is necessary to consult a doctor in time.