Small bowel diarrhea is considered to be related to enteritis, tumors, lactase deficiency, and dyspepsia. Treatment is divided into causative and symptomatic treatment. Small bowel diarrhea is actually a syndrome caused by abnormal excretion of fat in the feces and impaired absorption of intestinal soluble vitamins and nutrients such as sugar, protein and minerals due to various pathologies, and the treatment is divided into causative and symptomatic treatment. Causal treatment Anti-inflammatory, deworming, tumor removal, avoiding triggering factors; For bile salts, give anticholinergic; For lactase deficiency, give sugar-free, wheat-gum-free diet; For digestive enzyme deficiency, give polypeptide tablets and pepsin. Symptomatic treatment, mainly to replace the diarrhea lost nutrients, including water, electrolytes, energy. There are many other causes of small bowel diarrhea, it is recommended to consult the doctor as soon as possible, improve the examination, clarify the cause of the disease, and symptomatic treatment.