In middle-aged people, high pressure of 86mmHg and low pressure of 58mmHg is a manifestation of low blood pressure, which is not a normal phenomenon. Human blood pressure includes systolic pressure, which is high pressure, and diastolic pressure, which is low pressure. The normal range of systolic blood pressure is between 90 and 140 mmHg, and the normal range of diastolic blood pressure is between 60 and 90 mmHg. The normal blood pressure of human body has certain fluctuation, generally in the mood fluctuation or the activity is large when the blood pressure will be on the high side, the mood is calm or rest when the blood pressure will be reduced. However, normal blood pressure will not be higher or lower than the above range. In middle-aged people, the high pressure of 86mmHg and low pressure of 58mmHg are lower than the normal range, so it is considered to be a phenomenon of low blood pressure. Part of the population may be related to heredity, physical weakness, etc., and generally do not have obvious symptoms. Some of them are related to malnutrition, heart disease, allergic disease, endocrine disease, etc., and the patients will have dizziness, darkness in front of their eyes, pallor, weakness and other symptoms. If the patient’s blood pressure is persistently low, or accompanied by uncomfortable symptoms, it is necessary to go to the regular hospital to confirm the diagnosis and treatment.