Babies without symptoms of cold suddenly fever, consider acute bacterial or viral infections. Because under normal circumstances the baby’s nasal cavity, oral cavity, respiratory tract are the presence of viruses, such as rhinopathy, viral adenovirus, respiratory syncytial virus, in the baby’s body immunity decline, these viruses will be a large number of reproduction, into the blood circulation and caused by fever, should be actively symptomatic fever. If not more than 38.5 ℃, you can choose physical cooling using warm towels to wipe the head and face, palms, feet, armpits and other parts. If more than 38.5 ℃, you can use antipyretic drugs, such as ibuprofen suspension. Fever can cause convulsions, so it must be highly valued, and pay attention to feed more water to the baby and keep the bowels open.