Immediate defecation after meals may be a normal phenomenon, or may be related to acute gastroenteritis, irritable bowel syndrome, etc., need to be specifically analyzed. 1. Normal phenomenon: after eating, the gastrointestinal tract will reflex peristalsis. In particular, eating cold and cold, spicy and stimulating, hard food or the abdomen is cold, may lead to gastrointestinal peristalsis accelerated or gastrointestinal dysfunction phenomenon, resulting in the desire to stool after meals, stool is not shaped. 2. Acute gastroenteritis: this condition is often accompanied by abdominal pain, abdominal distension, loose watery stools and other symptoms, such as only recently appeared, may be related to unclean diet, intestinal flora disorder disorder, etc., after treatment can be improved. 3. Irritable bowel syndrome: the cause of irritable bowel syndrome has not been fully clarified, and it is considered to be related to visceral hypersensitivity, heredity, emotional changes and other factors. If the manifestation of abdominal pain after eating, relieve abdominal pain after defecation, and may occur at any time, but the test does not have a positive result, it is likely to suffer from irritable bowel syndrome. If you often have symptoms such as wanting to have a bowel movement immediately after meals, unformed stools, or abdominal pain, you are likely to have irritable bowel syndrome and are advised to consult a gastroenterologist or psychiatrist. If the phenomenon of frequent bowel movements immediately after meals, it is recommended to consult a doctor in time to clarify the cause of the disease, and actively treat it, so as not to delay the condition.