As soon as you eat your stomach grumbles and wants to have a bowel movement, consider acute gastritis, functional gastrointestinal disease and other causes. 1. Acute gastritis: severe trauma, surgery, alcohol, aspirin and other drugs can cause acute inflammation of the gastric mucosa, epigastric pain, nausea, vomiting, diarrhea and other symptoms, severe cases can lead to vomiting blood, black stools, shock, dehydration and other conditions. 2. Functional gastrointestinal diseases: (1) Functional dyspepsia: psychological, gastrointestinal hypersensitivity and other factors can cause postprandial fullness, early satiety, mid-upper abdominal distension, burning sensation, belching (burping), lack of appetite, diarrhea, nausea and other symptoms. (2) Irritable bowel syndrome: it is a kind of functional bowel disease characterized by abdominal pain accompanied by changes in bowel habits without organic lesions, with insidious onset and recurrent, prolonged symptoms. It can be accompanied by abdominal pain, diarrhea, nausea, constipation and other symptoms. A meal on the stomach rumbling, want to stool, there may be ulcerative colitis and other factors, it is recommended to consult a doctor to clarify the diagnosis, under the guidance of the doctor for targeted treatment.