The presence of tumor fever generally only indicates that the cancer cells are more active, but it cannot be used to determine the survival period, which depends on the follow-up treatment. Tumor fever usually appears in the late stage of cancer, and usually refers to the fever of cancer patients. Because cancer cells will affect the body’s ability to regulate body temperature, and the patient’s immunity will be reduced due to the tumor itself or the treatment received, especially when the cancer cells are active, fever may be caused by infection. In addition, drug reaction, patient’s autoimmune disease and cancer itself can cause fever. Therefore, the appearance of tumor fever alone cannot accurately determine the survival of patients. If the patient can cooperate with the treatment and the treatment effect is good, the survival time may reach 2-3 years, or may even reach the long-term survival effect. In addition, the different physical condition, mentality and family social environment of patients may also have some influence on the survival time of patients. It is suggested that patients with tumor fever should firstly maintain a good attitude, as tumor fever does not directly endanger life and there is no need to worry too much. Secondly, patients should go to the oncology department of regular hospital in time so as to deal with the symptoms, and at the same time, they should pay attention to regular work and rest and light diet.