4 months baby fever can be dealt with according to the body temperature through physical cooling, the use of fever-reducing drugs and other methods. 1. Physical cooling: 4 months baby fever, body temperature is not more than 38.5 degrees, you can take physical cooling, such as using warm water to wipe the body to promote heat dissipation, to accelerate the lowering of body temperature. At the same time need to give the baby to wear loose breathable clothing, do not give the baby too many clothes or cover too thick quilt. Also need to feed the baby the right amount of warm water, promote urination, accelerate the dissipation of heat. 2. Use antipyretics: If the baby’s temperature exceeds 38.5 degrees, the physical cooling effect is not obvious, you can give the baby to use acetaminophen and other antipyretics to lower the temperature. But acetaminophen can cause nausea, indigestion, vomiting and other adverse reactions, must be used under the guidance of a doctor. 4 months baby fever, need to take the baby to the hospital in time to check, clear the cause of the disease, under the guidance of the doctor to deal with and treatment, can not be blindly dealt with on their own.