Clinically, the blood pressure measured by the brachial artery of the upper limb is mainly used as the standard, and there is no reference standard for blood pressure at the ankles, which is generally considered to be similar to the normal standard, i.e., the systolic blood pressure is 90-140mmHg, and the diastolic blood pressure is 60-90mmHg. Since the ankle is far away from the heart, it is easy to produce a large error when measuring the blood pressure value at the ankle, therefore, clinically, the blood pressure in this area is not used as a standard, and it is recommended to use the traditional measurement site and way to measure blood pressure. Don’t be nervous or have big emotional fluctuations before measuring blood pressure, and don’t eat stimulating food or drink strong tea or coffee. Under normal circumstances, the normal range of blood pressure is 90-140 mmHg for systolic blood pressure and 60-90 mmHg for diastolic blood pressure. if the blood pressure is outside of this range, high blood pressure is usually diagnosed; if it is below the normal range, low blood pressure is usually diagnosed. If you are diagnosed with hypertension or hypotension, it is recommended that you seek prompt medical attention and pay more attention to a balanced diet and appropriate exercise.