Fever after chemotherapy for lung cancer should take different measures according to different reasons, and the common reasons are fever caused by chemotherapy drugs, fever caused by tumor itself, and fever caused by infection. Commonly used treatments include antipyretic treatment and anti-infection treatment. 1. Fever caused by chemotherapeutic drugs: chemotherapeutic drugs can cause fever, which can be relieved after physical cooling such as wiping the body with warm water, taking antipyretic and analgesic drugs such as ibuprofen, and so on, and the use of the drug can be stopped in serious cases. 2. Fever caused by tumor itself: Tumor itself can also cause fever, which is often high, and can be relieved by taking antipyretic and analgesic drugs such as ibuprofen, etc. If the fever recurs after stopping the drug, anti-tumor treatment should be actively carried out, and after the tumor condition is relieved, the fever will be relieved in general. 3. Fever caused by infection: Since lung cancer patients are weak and chemotherapeutic drugs can damage the immune system, they are easy to be infected and have fever. At this time, anti-infection treatment should be actively carried out, such as using penicillin and other antibiotics. Fever after chemotherapy for lung cancer may also be caused by other reasons, so patients should go to the hospital for follow-up in time and under the guidance of doctors.