Diarrhea and fever, i.e. diarrhea with fever, are considered to be related to acute gastroenteritis, chronic inflammation of the intestines, ulcerative colitis, acute appendicitis, etc. Prompt medical attention is recommended. Acute gastroenteritis is an acute inflammation of the mucosa of the gastrointestinal tract caused by various factors, which can be seen in viral, bacterial, parasitic and other infections. These pathogenic microorganisms invade the human gastrointestinal tract, can cause gastrointestinal mucosal edema, triggering an inflammatory response, leading to diarrhea, fever symptoms. In addition, chronic intestinal inflammation, ulcerative colitis, acute appendicitis can also cause diarrhea, fever and other symptoms in the early stage. When diarrhea with fever occurs, it is recommended to consult a doctor in a timely manner, complete the stool routine, blood routine and other related examinations, and clarify the cause of the disease under the guidance of a professional doctor.