Fever in newborn babies may be caused by environmental factors, infection, dehydration, etc. Firstly, the cause of fever needs to be clarified, and then treatment should be directed at the cause of the fever. The treatment is based on physical cooling, and if necessary, medication is given to lower the temperature. The environment around the newborn baby is too high temperature, such as room temperature is too high, wrapped too tightly too much, the temperature of the warmer is not controlled properly, etc., can cause the newborn baby body temperature rise. At this time, the body temperature can be gradually returned to normal by lowering the room temperature, opening the parcel, adjusting the warming box and other measures. If the fever is caused by pathological factors, physical cooling is often the main focus, such as taking warm water on the forehead of the child, reduce the clothing worn by physical cooling methods to lower the temperature, and encourage the child to drink more water. If necessary, acetaminophen and other antipyretic drugs can be given under the guidance of the doctor, and the cause of the disease should also be actively treated. Local or systemic infections caused by bacteria, viruses and other pathogens need to be identified and treated under the guidance of a doctor. For example, cefuroxime, vancomycin and other drugs can be used for neonatal pneumonia. Fever caused by blood concentration due to insufficient water in the body needs to be rehydrated as soon as possible. Newborn babies with fever need to consult the doctor in time and be treated under the doctor’s guidance. Parents should not use medication without authorization to avoid serious effects. At the same time, parents and healthcare workers should closely observe the condition of the child and deal with any abnormality in a timely manner.