Whether diarrhea occurs in patients with acute appendicitis is objectively analyzed according to the different degrees of severity of appendiceal infection and whether the abdominal cavity is accompanied by more pus accumulation. First, if a patient with appendicitis has a mild degree of infection, there is no obvious accumulation of fluid or pus in the abdominal cavity, and there is no large amount of lodging in the intestinal canal. Its main manifestations are nausea, vomiting, abdominal pain, abdominal distension, etc., and there will be no manifestation of diarrhea. Second, if the onset of appendicitis patients with more residual stool in the intestinal canal, and appendicitis inflammation is heavy, accompanied by local suppuration or gangrene-like changes, the abdominal cavity with more fluid, pus accumulation. Due to the inflammatory stimulation of the abdominal cavity, the patient may experience accelerated intestinal peristalsis and manifest diarrhea. It is necessary to perform timely surgery to remove the appendix and clean the abdominal cavity in order to achieve better treatment results and avoid complications such as inflammatory bowel obstruction and abdominal infection.