Feces that are smelly and sticky can be caused by gastrointestinal dysfunction, gastroenteritis, Crohn’s disease, intestinal tumors and other diseases. 1. Gastrointestinal dysfunction: Functional dyspepsia, irritable bowel syndrome, functional constipation affects the gastrointestinal function, when eating a lot of greasy and indigestible food, such as fried chicken, marinated meat, etc., due to the decline in gastrointestinal digestive function, intestinal peristalsis slows down, resulting in feces in the intestinal tract for a long time to stay and ferment, so that the feces is smelly and sticky. 2. Gastroenteritis: Bacteria, fungi, viruses, etc. can cause inflammation of gastrointestinal mucosa, causing abdominal pain, diarrhea and other symptoms, diarrhea can cause intestinal flora imbalance, harmful bacteria increase, bacterial decomposition products may produce acidic odor, resulting in smelly and sticky stools. 3. Crohn’s disease: Intestinal congestion, edema and even ulceration can cause increased secretion of intestinal mucosa. In addition, prolonged diarrhea will make the intestinal resistance decrease and harmful bacteria increase, which will eventually cause the phenomenon of smelly and sticky stools. 4. Intestinal tumor: tumor tissue ulceration, necrosis, decomposition products can produce foul smell. There are many other causes of smelly and sticky stools, such as intestinal tuberculosis, etc. It is recommended to consult a doctor in time for a clear diagnosis and targeted treatment.