If the fever does not subside, it is likely that the intravenous medication is not appropriate and needs to be switched to another medication. After infusion of fever in children, the effect of reducing fever will be slower, usually takes about 3 days. During the fever infusion period, you must drink more water, warm water baths and other methods of physical cooling can help the body quickly reduce fever. The fever may be accompanied by other complications, such as lung infections, respiratory infections and other symptoms, so you should always observe the changes in your body, go to the hospital in a timely manner for medication adjustment treatment, pay attention to more rest, more temperature monitoring, generally about a week to achieve the recovery effect; diet should be regular, eat light and nutritious food; at the same time, you need to exercise to strengthen the body’s resistance.