Your baby has a fever above 100.4°F (38°C), and the reason for the fever is not obvious. Many things can cause a fever. The most common causes are bacterial or viral infections.

What can I expect when I take my baby to the doctor?

A caregiver will ask you questions about your baby’s illness. Then, the caregiver will examine your baby. If the caregiver is concerned that your baby may have a serious infection, we will do tests on your baby’s urine, blood or spinal fluid. This can help find the cause of the fever.