Steatorrhea is a clinical syndrome in which the digestive and absorptive functions of the small intestine are reduced for various reasons, so that nutrients are not fully absorbed and excreted in the feces, causing nutritional deficiency. It can be treated with pancreatic enzyme tablets, vitamins and other medications according to the cause and severity of the disease. Patients with steatorrhea excrete excessive fat in the stool, also known as oily diarrhea. The causes are common, such as malabsorption syndrome, bile salt and pancreatic digestive enzyme deficiencies, small bowel inflammation or intestinal fat metabolism disorders, etc. Treatment includes replacement therapy, etiologic therapy and adjunctive therapy. 1. Replacement therapy: replenish the lost water and electrolytes as well as various nutrients and vitamins. 2. Etiologic treatment: If pancreatic insufficiency, pancreatic enzyme tablets can be given. In addition to the treatment of bile salt deficiency, it is advisable to add medium-chain triglycerides in the diet to improve the nutritional status of patients. 3. Auxiliary treatment: give high calorie, high protein, low fat diet. It is recommended that patients with steatorrhea go to regular hospitals in a timely manner, under the guidance of doctors to standardize the treatment, and not blindly use their own medication to cause adverse reactions.