Gastroenteritis often occurs, which may be caused by the following reasons. The most common is poor eating habits, mainly due to unclean diet and food deterioration. Or due to the low immune function of the human body, cancer, diabetes, AIDS and other diseases, the immune function of the intestinal mucosa is poor, resulting in bacteria and viruses easily infecting the intestinal tract, causing gastroenteritis. In addition, if there are recurrent gastroenteritis symptoms, such as recurrent abdominal pain, diarrhea, abdominal pain relief after defecation and other related symptoms, it is also necessary to consider whether it is caused by functional bowel diseases such as irritable bowel syndrome. In general, young and middle-aged patients are more common. Mental stress, environmental changes, emotional stimulation and other incentives can also induce the onset of irritable bowel syndrome.