Steatorrhea is a clinical syndrome in which the digestive and absorption functions of the small intestine are reduced for various reasons, resulting in the incomplete absorption of nutrients and their excretion in the feces, causing a nutritional deficiency, also called dyspepsia syndrome. Why does the human body have steatorrhea? 1, hepatobiliary disease More often seen in the biliary tract obstruction lesions in the extrahepatic bile duct obstruction, or intrahepatic bile duct obstruction, because the bile duct obstruction is most likely to cause bile retention, bile composition changes, resulting in a significant decrease in the concentration of bile acids in the intestinal cavity, thus affecting the digestion of fat hydrolysis and fatty acid decomposition, forcing fat from the stool, the occurrence of steatorrhea. 2, intestinal diseases various intestinal infections, extensive resection of the small intestine, primary small intestinal lymphoma, small intestinal ischemia caused by arteriosclerosis, intestinal lipid metabolism disorder syndrome, eosinophilic gastroenteritis, food allergies, etc., may damage the digestive function of small intestinal mucosal epithelial cells and occur steatorrhea. 3, pancreatic diseases chronic pancreatitis and pancreatic cancer in pancreatic lesions. This is mainly due to a significant decrease in pancreatic lipase secretion by the pancreas, resulting in poor fat digestion and causing a large amount of fatty substances to be excreted from the stool. 4, endocrine diseases Hyperaldosteronism, hypothyroidism, and even hyperthyroidism in a few endocrine diseases can also occur in steatorrhea. This is because endocrine disorders can easily trigger lipid metabolism disorders, and then steatorrhea occurs. 5.Other β-lipoproteinemia, γ-globulinemia, after most of the gastric resection, and scleroderma also tend to cause fat metabolism function to be reduced and steatorrhea occurs.