Recurrent fever is not normal for pneumonia. If the diagnosis of pneumonia is clear, the clinical symptoms can be better controlled through a regular and sufficient course of anti-infective treatment, and the body temperature can return to the normal range. If the temperature still fluctuates after pneumonia has been treated with anti-infective therapy, it is necessary to consider another evaluation of the condition. First, assess whether the diagnosis is pneumonia. Second, if the diagnosis of pneumonia is confirmed, the pathogen needs to be examined again to ensure that the antimicrobial drug chosen covers the causative organisms and has an effective bactericidal effect. Therefore, when there is recurrent fever in pneumonia, further assessment and targeted treatment is needed.