Patients with lung cancer accompanied by fever should clarify the cause of fever, and carry out physical antipyretic and use antipyretic and anti-infectious drugs to reduce fever along with active anti-tumor treatment. Fever of patients with lung cancer may be cancerous fever, that is, fever caused by tumor necrotic material being absorbed by the body. At this time, medicines such as ibuprofen and acetaminophen can be given to reduce fever, and at the same time, ice packs can be placed or wiped with lukewarm water to cool down the temperature. If the patient’s fever is caused by the body’s low immune function and lung infection, etc., anti-infection treatment, such as the use of penicillin and other drugs, should be carried out at the same time with the use of antipyretic drugs such as ibuprofen and acetaminophen. It is suggested that patients with lung cancer accompanied by fever should actively communicate with attending doctors to find out the cause of fever and actively treat the cause and symptom to avoid delaying the condition while actively taking anti-tumor treatment.