Stool odor may be due to dietary reasons or the patient himself has constipation, as well as the symptoms of intestinal obstruction, these conditions may lead to stool odor. 1. Dietary reasons: if the patient’s daily diet like to eat some, high protein, high fat, greasy food, leading to indigestion, or eat some spicy stimulating food, will lead to intestinal decomposition of ammonia increase, the odor of feces will increase. 2. Constipation: constipated patients, due to the decline in gastrointestinal peristalsis, feces is difficult to discharge, a lot of stagnation in the intestinal tract, stagnation for a long time, a large number of bacteria in the reproduction, will lead to a greater odor of the stool. 3. Intestinal obstruction: Intestinal obstruction is mostly caused by intestinal adhesions or intestinal tumors, which leads to decreased digestive ability and abdominal pain, thus causing constipation and stopping the exhaust and other symptoms, so the stool will become very smelly. Foul-smelling stools may also be caused by other reasons. It is recommended that patients go to the hospital as soon as possible to find out the cause of the disease and then take treatment under the guidance of the doctor.