Patients with advanced cancer who have daily fever are in danger of losing their lives if their condition continues to develop. The most common cause of fever is infection, such as lung infection, urinary system infection, etc. However, other causes may also cause fever, such as cancer absorption fever, etc. If the fever persists for a long period of time, it is necessary to further improve the relevant laboratory tests to clarify the cause of fever and provide symptomatic treatment. If the fever of advanced cancer patients can not be controlled, it will cause great wear and tear to the body, which is unfavorable to the control of the disease, and may lead to life-threatening situation. Patients with advanced cancer may also show symptoms such as fever, body wasting, weakness, loss of appetite, irritability, dyspnea, pain and so on. Patients with advanced cancer who have fever every day need to actively consult the doctor and be treated under the guidance of the doctor’s interview, do not give patients blind medication to avoid life-threatening situations.