It is usually not a good sign for patients to have fever symptoms after chemotherapy, but it needs to be analyzed according to the specific situation and cannot be generalized. When chemotherapy is administered to tumor patients, it not only damages or kills tumor cells, but also damages normal cells of the body, especially white blood cells. After chemotherapy, the number of leukocytes in the body is obviously reduced, and bacterial or viral infections will easily occur. And the infection will cause fever symptoms, and in serious cases, it may trigger lung infection, which needs timely anti-infection treatment. In addition, because tumor cell mass necrosis will release thermogenic source, tumor cell mass necrosis will also cause fever symptoms, but the body temperature usually does not exceed 38.5℃. Therefore, tumor patients with fever symptoms after chemotherapy must communicate with clinicians in time to determine the cause of fever and deal with it in time. After chemotherapy, tumor patients must pay attention to rest, light diet, pay attention to keep warm, avoid spicy and stimulating food, take appropriate physical exercise to improve physical fitness and enhance their immunity, and also enhance their immunity through oral medication.