Having diarrhea after eating is not always a symptom of bowel cancer. It could also be diseases such as enteritis and irritable bowel syndrome, such as diet, emotions and other life and dietary factors may also lead to it. Early symptoms of bowel cancer are atypical, showing only loss of appetite, change of bowel habit and stool pattern. Typical symptoms may include blood in stool, anemia, weight loss, abdominal pain, etc., which need to be clarified by combining with colonoscopy, stool routine and tumor markers. 1. Other diseases: such as bacterial enteritis may also have fever, abdominal pain and other symptoms, mostly with a history of unclean diet; such as irritable bowel syndrome may also have intestinal tinnitus, abdominal pain and other symptoms, mostly related to emotional changes. 2. Dietary factors: such as eating chili, garlic stimulating food can lead to gastrointestinal tract peristalsis enhancement, diarrhea; such as emotional depression can lead to gastrointestinal tract digestive function decline, diarrhea. For the case of diarrhea after eating, it is recommended to consult a doctor to rule out the possibility of intestinal cancer with the necessary tests, and then standardize the diagnosis and treatment.