For fever below 38 degrees, physical cooling is needed first. 1. You can use a warm towel to wipe the armpits, groin, neck and other places rich in large blood vessels to help reduce fever. If you have a stuffy nose, runny nose and sore throat, you have an upper respiratory tract infection and need to take some oral anti-inflammatory solution. 2. If you have abdominal pain and diarrhea, you need to check your stool routine to determine if it is a bacterial enteritis. 3. There is no elevation of white blood cells. If not, drink more water and take more rest. 5. Once the body temperature exceeds 38.5 degrees, it is necessary to carry out heat treatment, you can take oral ibuprofen suspension, the specific dosage according to the weight according to the instructions to use.