If you still have a fever after the fever-reducing injection, you should consider that the condition may not be completely controlled, and there is still inflammatory material exuding from the body, and there is still inflammation that has not subsided. At this time, it is recommended to apply antipyretic medicine to reduce fever. However, the interval between the antipyretic injection and the antipyretic injection should be at least four hours to prevent the side effects of the antipyretic agent. At the same time, blood tests and other related examinations can be conducted to clarify the cause of the infection, whether it is a virus, bacteria, or other pathogens, and then targeted anti-inflammatory or antiviral drugs can be selected to treat the cause. At the same time, pay attention to rest, drink more warm water and warm juices, and keep a follow-up appointment.