Lung cancer with dizziness may be caused by anemia due to lung cancer, lung cancer with brain metastasis, or side effects of anti-tumor treatment. 1. Anemia, lung cancer is a chronic consumptive disease, with the progress of the disease, patients will have anemia or bone marrow suppression caused by radiotherapy, which may also have anemia, manifested as dizziness, fatigue and other symptoms, and severe malnutrition and malignant disease may occur. 2. Lung cancer with brain metastasis, brain metastasis in late stage of lung cancer is a common phenomenon, which may be due to intracranial hypertension, cerebral edema and other symptoms, and serious coma may occur, which needs timely treatment. 3. Side effects of anti-tumor treatment: some chemotherapy drugs or targeted drugs may cause dizziness. When lung cancer is accompanied by dizziness, it is necessary to be vigilant, if brain metastasis has occurred, it is easy to jeopardize life, and timely medical treatment is needed.