2-year-old baby diarrhea fever may bacterial enteritis, viral enteritis, gastrointestinal cold and other related. 1. Bacterial enteritis: for example, enterotoxin-producing Escherichia coli, invading the intestinal tract, the toxin causes secretory diarrhea, and fever can also occur. 2. Viral enteritis: commonly associated with rotavirus infection, invading the intestinal tract and causing cellular necrosis. Intestinal fluid collects in the intestinal lumen causing diarrhea, which may be accompanied by fever. 3. Gastrointestinal cold: when the common cold, eating too much or improper food composition, the food can not be fully absorbed and stagnate in the small intestine, the food corruption and fermentation, will stimulate the intestinal wall peristalsis accelerate the appearance of diarrhea, there will also be fever. 2-year-old baby diarrhea fever, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.