Patients with foamy stools consider the following reasons: 1, intestinal infections: such as viral enteritis, bacillary dysentery, patients with fast intestinal peristalsis, feces unformed, gas production, easy to foamy stools. 2, irritable bowel syndrome: intestinal dysfunction can also cause increased intestinal peristalsis, diarrhea. 3, dietary improprieties: eating too much cold and spicy stimulating food, there will be gas, defecation abnormalities. 4, chronic pancreatitis : When the exocrine function of the pancreas loses more than 90%, there will be pancreatic exocrine insufficiency, which leads to the secretion of pancreatic enzymes after meals, making it difficult to maintain normal food digestion, manifesting as lethargy, abdominal distension, loss of appetite, fat digestion and malabsorption, and even steatorrhea, frequent stool discharge, foul-smelling feces, which float on the surface of the water in foam, and lipid droplets and myofibers can be seen in the microscopic examination, which, if not treated in time, will lead to a decrease in circulating levels of fat-soluble vitamins. To summarize, when the patient has a change in the nature of the stool should consult a doctor in time, give the relevant examination, comprehensive treatment, so as not to delay the condition.