Simply from the normal value of blood pressure, blood pressure 99/58mmHg diastolic blood pressure is lower than the minimum value, is not a normal phenomenon, due to the small gap, whether it is normal should also be assisted by other tests for diagnosis. The World Health Organization recommended standard systolic blood pressure normal value of 90 ~ 139mmHg, diastolic blood pressure of 60 ~ 89mmHg, when the diastolic blood pressure is 58mmHg, slightly lower than the normal diastolic blood pressure of the lowest value, purely from the point of view of the blood pressure value is not normal. Since the difference is small, it is best to judge whether the blood pressure is normal based on previous blood pressure values, auxiliary examinations, and symptoms and signs together. If the blood pressure is lower than normal for a long time, you can go to the hospital to see if it is caused by diseases, pay attention to balanced nutrition, eat some high protein, vitamin food, pay attention to rest, avoid overwork.