Diarrhea in hypertensive patients should be based on the patient’s symptoms, signs, and relevant examinations to clarify the cause of diarrhea. Diarrhea is commonly caused by gastrointestinal dysfunction and dyspepsia, and may be caused by bacterial and viral infections causing acute gastroenteritis, or allergic diarrhea, chronic enteritis, ischemic enteropathy, etc. Stool routine or blood routine should be checked to clarify. Hypertensive patients with diarrhea should pay attention to whether it is related to antihypertensive drugs. Antihypertensive drugs, such as olmesartan, can cause olmesartan-related enteropathy, leading to diarrhea, and dehydration during diarrhea in hypertensive patients can lead to a drop in blood pressure.