Postoperative fever after pituitary tumor surgery, if the fever is low, mostly consider the absorption fever caused by the surgery, which is a normal phenomenon, and will return to normal in about three days. If high fever occurs after surgery, it needs to cause great attention, this kind of fever is not a normal phenomenon, and needs to be highly suspicious of the possibility of combined intracranial infection. Because the pituitary tumor may lead to cerebrospinal fluid leakage after surgery, and cerebrospinal fluid leakage is the cause of intracranial infection, it is necessary to improve the lumbar spinal puncture examination, and retain the cerebrospinal fluid at this moment. At the same time, check the body to find out whether there is neck strength, meningeal irritation signs, etc.. If the cerebrospinal fluid laboratory test suggests that the white blood cells are higher than normal, the possibility of intracranial infection needs to be highly suspected, and active anti-infection treatment is needed.