Half-year-old baby suddenly fever in the middle of the night, to take the temperature, if the temperature is within 38.5 ℃, you can give the child to do physical cooling such as feeding the child more warm water, do warm water bath or warm bath. If the temperature exceeds 38.5 ℃, you need to give the child with antipyretic drugs, half-year-old babies can use antipyretic drugs including ibuprofen and acetaminophen, there are oral dosage form, but also plug the anus with suppositories, can achieve the purpose of reducing fever. As the immunoglobulin from the mother’s body has been depleted and the baby cannot produce immunoglobulin by itself, the baby is particularly prone to infections after the age of half a year. Once the baby has a fever, it indicates that there is an infection in the body and the baby needs to be taken to the hospital for routine examination to clarify the site of the infection, the cause of the infection and the extent of the infection so that timely treatment can be given to prevent the infection from spreading.