A 74-year-old man with lung cancer may be considered for chemotherapy if he is still in good health and has a need for chemotherapy. If his physical condition is poor, he is not suitable for chemotherapy. A 74-year-old man suffering from lung cancer should not blindly undergo chemotherapy because chemotherapy is prone to side effects, such as bone marrow suppression, liver and kidney function damage. If the patient’s physical condition is relatively poor and there are underlying diseases that make it difficult to tolerate the side effects of chemotherapy, do not force chemotherapy to avoid aggravating the condition. If the patient’s physical condition is relatively good and can tolerate the side effects of chemotherapy, chemotherapy can be considered if there is a need for chemotherapy in this case. It is recommended that the patient under the guidance of the doctor active treatment, do not let the patient self-medication, if the chemotherapy produced adverse side effects should be timely contact with the attending physician, in accordance with the situation to deal with.