3 months baby fever is mostly caused by bacterial or viral infections, need to reduce fever in a timely manner, followed by medical attention to clarify the cause of fever, take general treatment, medication, etc., please follow the doctor’s instructions. 1. General treatment: If the baby’s body temperature is lower than 38.5 ℃, it is usually recommended to prioritize the use of physical cooling to reduce fever, such as using warm towels to wipe the forehead, neck, armpits, etc., and pay attention to drink more water, more rest. 2. Medication: If the baby’s fever exceeds 38.5 ℃, consider taking ibuprofen suspension drops and other antipyretic medication. In addition to the need for medical examination, clear causes of fever to give targeted treatment, such as secondary bacterial infections caused by fever, antibiotic treatment, such as penicillin (such as amoxicillin), cephalosporins (such as cephradine) and so on. 3 months baby fever should be closely measured temperature, pay attention to the baby’s mental state, and timely consultation with the doctor to follow the treatment, do not blindly give the baby medication. At the same time, pay attention to the ventilation of the room, to prevent cross-infection and the occurrence of complications. The above drugs should be used under the guidance of a doctor.