Hypotension is also known as low diastolic blood pressure. There are many causes of low diastolic blood pressure, for example, like congenital hereditary factors. For such patients, there are often no uncomfortable symptoms in the actual clinic because the patient has tolerated this low blood pressure state. There are also some patients who develop diastolic hypotension, which may be due to frequent nausea, vomiting, diarrhea, inadequate feeding, and cachexia states. In addition, some patients may have low diastolic blood pressure due to overdose of antihypertensive drugs. We have to adjust the use of oral antihypertensive drugs accordingly, and if necessary, we need to advise patients to stop taking antihypertensive drugs. Relatively speaking, it is not recommended to lower the diastolic blood pressure too low, and it is best to control it above 65 mmHg and below 80 mmHg, and patients will benefit the most.