After a fever, injections and medications are not able to reduce the fever, which means that the condition is serious, the cause is not identified or antibiotics are not used for standard treatment, commonly used antipyretic drugs are ibuprofen capsules and acetaminophen dispersible tablets, the body temperature will drop to normal after taking antipyretic drugs. Further antibiotics need to be given for standardized treatment because the most common cause of fever is pathogenic infection, which commonly includes bacteria, viruses, mycoplasma or a combination of several pathogens. Especially in children, whose thermoregulatory centers are not well developed, the symptoms of fever will often appear, so it is important to identify the pathogens early and give sensitive antibiotics. For severe fever that does not go away, it can be treated by intravenous infusion of medication, and the fever can be reduced after oral antipyretics or fever-reducing injections. If the fever does not subside, it is recommended to go to the hospital for further consultation and treatment to clarify the cause of the fever through blood collection or further examination.