Physical cooling should be used to reduce fever in infants under 6 months of age.For infants over 6 months of age, medications such as ibuprofen and acetaminophen can be used under the direction of a physician. When infants under 6 months of age have a fever, try to lower the temperature physically by wiping the face, neck, armpits, etc. with warm water, and rehydration fluids can be used under doctor’s supervision if necessary. if the temperature is difficult to drop or continues to rise, medication can be used as prescribed by the doctor if necessary. Infants over 6 months of age with fever less than 38.5 ℃ can also use physical cooling, if necessary, can be rehydrated under the guidance of a doctor. Infants over 6 months of age with fever greater than 38.5℃ can use ibuprofen granules, ibuprofen suspension, in addition to allowing the baby to drink milk appropriately, and can be rehydrated under doctor’s supervision if necessary. Children who have difficulty with oral medications can use acetaminophen suppositories to numb the anus, and the effect of fever reduction is also better. Before using fever-reducing drugs, you need to go to the hospital to consult a doctor, and at the same time for the cause of fever, actively treat the original disease.