The fever can cause diarrhea in babies, as follows: 1. When a baby has a respiratory infection, such as acute tonsillitis or acute bronchitis, it is easy for the baby to have diarrhea due to poor spleen and stomach function and improper feeding in the disease state. 2. The fever itself is caused by viral or bacterial infection of the gastrointestinal tract, such as viral enteritis or bacterial dysentery. The baby will have fever and diarrhea at the same time, i.e. diarrhea occurs. 3, acute gastroenteritis caused by improper feeding of the baby, there will be fever, vomiting and diarrhea at the same time. The specific cause of the fever and diarrhea of the baby is different, take the targeted treatment plan can be.