The symptoms of diarrhea after eating are mainly due to the following reasons: 1. unclean diet, the ingested food contains certain bacteria, which can easily lead to acute inflammation of the gut after entering the stomach and intestines, resulting in the symptoms of diarrhea. 2. suffering from gastroenteritis, which can easily lead to the onset of gastroenteritis after the food enters the stomach and intestines, resulting in abdominal pain and diarrhea. 3, suffering from irritable bowel syndrome, this condition usually has no obvious symptoms, mainly due to mental factors, after the diet will cause this symptom attack. In addition, the imbalance of the gastrointestinal flora can also cause this symptom, especially after being stimulated by food, it will cause obvious diarrhea and other symptoms.