One year and nine months of fever without symptoms of the baby, low-fever children generally use physical cooling can be, if the fever is greater than 38.5 degrees, you can give appropriate antipyretic treatment, such as ibuprofen and so on. One year and nine months fever without other symptoms of the baby, the mental state of the baby can use physical therapy, in the head of the ice paste, the use of warm water to wipe the body, pay attention to rest, the body temperature can be reduced. If the fever is greater than 38.5 degrees, physical cooling effect is not good, it is recommended to follow the doctor’s advice to use antipyretic treatment, such as ibuprofen and so on. If the fever persists and cannot be effectively relieved by physical therapy or medication, it is recommended to consult a doctor for examination to identify the cause of the illness and to treat it.