High pressure 80mmhg low pressure 46mmhg belongs to low blood pressure, divided into physiological low blood pressure and pathologic low blood pressure two kinds of, and the form of thin, genetic and malnutrition, hypertrophic cardiomyopathy and other diseases related. In normal people, high pressure (systolic pressure) is 90~140mmhg, low pressure (diastolic pressure) is 60~90mmhg, and high pressure 80mmhg and low pressure 46mmhg is called low blood pressure, which can be physiological low blood pressure or pathological low blood pressure. Physiologic hypotension refers to a portion of the healthy population whose blood pressure falls to the standard of hypotension, but without other symptoms. The cause is not very clear, and may be related to factors such as thinness and heredity. Pathological hypotension is mainly caused by diseases of certain organs or systems, such as malnutrition, hypertrophic cardiomyopathy, aortic valve stenosis and so on. For people with low blood pressure, they need to pay attention to their daily diet, and take in foods containing salt. At the same time, regular work and rest, avoid overwork. If high blood pressure is caused by disease, it is necessary to seek medical treatment in time.