Eating and pooping may be bad stomach or bad intestines. Eating and pooping may be caused by intestinal dysfunction, gastritis, peptic ulcer and other diseases. 1. Intestinal dysfunction: Irregular diet, bad mood and other mental factors can lead to intestinal dysfunction, and then the symptom of having diarrhea after eating. 2. Gastritis: Gastritis is an inflammatory lesion of the gastric mucosa, which often manifests itself as pain in the middle and upper abdomen, bloating, belching, nausea, loss of appetite, gastrointestinal bleeding, etc., and then the symptom of pulling up after eating appears. 3. Peptic ulcer: peptic ulcer refers to the gastrointestinal mucosa digested by gastric acid and pepsin and ulcers, most of which are characterized by recurring episodes of rhythmic pain in the middle and upper abdomen, diarrhea, abdominal distension and other symptoms, leading to the phenomenon of eating and then pulling. There may be other causes such as intestinal tuberculosis, gastric ulcers and other diseases, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.