4-year-old baby had a high fever. How did he have a fever again after taking antipyretic?

The baby has a high fever and has a fever after taking antipyretic drugs. It is recommended to take the baby to the hospital for C-reactive protein examination and blood routine examination to determine whether there is bacterial infection. If the patient has bacterial infection, it needs to be treated with antibiotics according to the doctor's advice. Usually, it can be cooled by warm water bath or ice compress.