The presence of a floating layer on the stool can be classified as a physiological phenomenon as well as a pathological manifestation. If excessive consumption of high-fat and high-cholesterol foods in the course of daily diet will lead to an increased burden on the gastrointestinal function, and some of these substances will react with the excrement in a mixed manner without being completely decomposed and transformed, and lead to the symptoms of physiological oily stool. In addition, digestive system diseases can also cause such adverse symptoms, such as liver cirrhosis, bile duct blockage, duodenal bulb ulcer, etc. Because the liver, gallbladder, duodenum and other organs are the main place to produce and store bile, once they have organic lesions, not only will bile secretion or transport function be blocked, but also cause fat, cholesterol and other substances in the digestive tract can not be properly decomposed and absorbed, and can only be excreted as The bile is not only blocked in bile secretion or transport, but also prevents the normal decomposition and absorption of fat and cholesterol in the digestive tract, and can only be excreted in the form of excrement, resulting in sticky stools, loss of appetite, abdominal distension and pain.