Hypotension is generally considered to be when the systolic pressure in the arteries of the upper extremities of adults is less than 90 mmHg (and) or the diastolic pressure is less than 60 mmHg. Hypotension is a state in which the pressure in the arteries of the body circulation is lower than normal. It can be divided into physiologic and pathologic hypotension according to the etiology, and into acute and chronic hypotension according to the form of onset. Physiological hypotension means that the blood pressure of some healthy people has reached the standard of low blood pressure, but there are no conscious symptoms, no abnormalities such as ischemia or hypoxia in various systems and organs, and it does not affect the life expectancy. Patients with pathologic hypotension are often accompanied by symptoms or certain diseases, including primary and secondary. The former refers to the state of low blood pressure with no obvious cause, and is mostly seen in the elderly and women with thin physique. Secondary hypotension can be seen as a sharp decrease in blood pressure caused by hemorrhage, allergy, etc., or slowly occurring and gradually aggravating hypotension secondary to tuberculosis, malignant tumors and other diseases. Physiological hypotension is generally not harmful to the body, while pathological hypotension may lead to insufficient blood supply to all tissues of the body and symptoms of ischemia in corresponding organs. Hypotensive patients can take appropriate exercise and supplement nutrition in daily life, and if they feel that low blood pressure affects their normal life, it is recommended that they actively seek medical treatment.