60-90 generally refers to a diastolic pressure of 60mmHg and a systolic pressure of 90mmHg, which is in the low end of the normal blood pressure range. In general, adult blood pressure is divided into systolic and diastolic blood pressure, systolic blood pressure is high pressure, the normal range is 90~139mmHg, diastolic blood pressure is low pressure, the normal range is 60~89mmHg. when the systolic blood pressure is 90mmHg, diastolic blood pressure is 60mmHg, then it reaches the lowest value of the normal range. For people with low blood pressure, they should actively seek medical treatment to find the cause of the disease, and the common causes include physiological and pathological categories. Physiological low blood pressure can have no obvious clinical symptoms, while pathological low blood pressure needs to cooperate with the doctor to make a clear diagnosis, and the common causes include hemorrhage, infectious diseases, and the use of diuretics, etc. The specific treatment of low blood pressure should be in accordance with the doctor’s instructions. The specific treatment of low blood pressure should follow the doctor’s instructions, not self-medication, in order to prevent the emergence of adverse consequences.