A child with a fever of 38.5℃ is a moderate fever, whether it is serious or not depends on the specific situation, and cannot be generalized. If the temperature is 38.5℃ caused by a cold, it usually does not lead to serious problems. You can take oral antipyretic drugs according to the weight of the child, and pay attention to drink more water after using the drugs, together with warm water to wipe the neck, armpits, groin and other parts of the body rich in blood vessels to help reduce fever. However, if the fever is caused by viral encephalitis, bacterial encephalitis, etc. and the temperature is 38.5℃ and continues to rise, accompanied by headache, vomiting, drowsiness, body discomfort or abdominal pain, diarrhea and other symptoms, the situation is usually more serious and needs to be taken seriously, so as not to delay the condition. If a child has a fever of 38.5℃, physical cooling can be used first, but if the temperature continues to rise, it is recommended to go to the pediatrician of the hospital for a clear diagnosis, such as blood tests, and then to treat the cause.