Chronic diarrhea patients are mostly manifested as increased stool frequency, thin or unshaped stools, some patients can also be accompanied by mucus, pus and blood, etc., and the duration of the disease is long. Chronic diarrhea is a common clinical gastrointestinal symptoms, refers to the patient’s diarrhea for more than two months, or intermittent recurrent diarrhea for 2 to 4 weeks, can be caused by a variety of diseases. Typical symptoms of patients are increased frequency of stools, thin, unformed stools, which may be accompanied by mucus, pus and blood and other abnormalities. Patients with chronic diarrhea may also experience abdominal discomfort, loss of appetite, and other discomforts. Chronic diarrhea caused by diseases of the small intestine, the patient may feel discomfort around the umbilicus, the symptoms will worsen after meals or before bowel movements, the stool volume increases, the color becomes lighter. Chronic diarrhea caused by colon disease, the patient may feel discomfort on both sides of the abdomen or in the lower abdomen, the symptoms may be relieved after bowel movement, the frequency of bowel movement increases but the amount is relatively small, and blood and mucus may be present in the bowel movement. Chronic diarrhea caused by rectal lesions is usually accompanied by a feeling of urgency and heaviness (discomfort in the lower abdomen, a strong desire to relieve the bowels, and a feeling of incomplete evacuation after a bowel movement). If the patient has chronic diarrhea for a long time or repeatedly, it is recommended to consult a doctor in time to identify the cause of the disease and carry out targeted treatment to avoid delaying the condition.