If your baby has a low fever for a while and a normal fever for a while, this situation is considered to be an infection. It is recommended to check the blood count, C-reactive protein and calcitoninogen at the hospital to see if it is a viral or bacterial infection. Also observe whether your baby has other co-morbid symptoms, such as nasal congestion, runny nose, cough or diarrhea. If these symptoms are present, a chest X-ray or stool examination should be done to see if the fever is caused by a respiratory tract infection or a pediatric enteritis, and only after thorough treatment of the primary cause can the fever not recur. If it is a respiratory tract infection, symptomatic treatment such as anti-infection can be given. If it is caused by pediatric enteritis, it needs to be treated with rehydration and other symptomatic support.