As soon as you finish eating, you want to have a bowel movement, and the bowel movement is not shaped, which may be a normal phenomenon, or it may be caused by irritable bowel syndrome and organic lesions of the intestinal tract. 1. Normal phenomenon: after eating, the gastrointestinal tract will reflex peristalsis. In particular, eating cold, cold, spicy, 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. Irritable bowel syndrome: the cause of irritable bowel syndrome has not been fully clarified, and it is considered to be related to the high sensitivity of internal organs, heredity, emotional changes and other factors. Frequent symptoms such as wanting to have a bowel movement after meals, unformed stools, abdominal pain, etc. are considered to be related to irritable bowel syndrome, and it is recommended to go to the gastroenterology department or psychiatry department of the hospital to clarify the cause. 3. Organic intestinal lesions: Organic intestinal lesions, such as intestinal polyps, ulcerative colitis, intestinal malignant tumors, can affect intestinal function, leading to diarrhea, abdominal pain, stool characteristics and habits of patients change. Wanting to poop after eating is related to a variety of factors, it is recommended that patients do not blindly use medication, you can go to the hospital gastroenterology department for relevant examinations, a clear diagnosis.