A diastolic blood pressure of 63 mmHg is normal. The normal diastolic blood pressure range is 60 to 89mmHg, 63mmHg is within the normal range, when the diastolic blood pressure is lower than 60mmHg it is considered low diastolic blood pressure. When the diastolic blood pressure is greater than or equal to 90mmHg in several consecutive measurements, it is considered high blood pressure. Hypertension is categorized into primary hypertension and secondary hypertension. The cause of primary hypertension is unknown and may be related to heredity, while secondary hypertension may be caused by kidney disease, endocrine disease, vascular disease or craniocerebral disease. Careful diet, reduced consumption of fried or high-fat foods, and appropriate exercise can reduce the risk of hypertension. If there is any abnormality in blood pressure, you should go to the hospital for treatment as soon as possible to avoid delay.