Possible causes of lung cancer with dizziness include brain metastasis of lung cancer, combined cerebrovascular disease, anemia, malnutrition and so on. 1. Lung cancer brain metastasis: it is mostly seen in patients with advanced stage of lung cancer. If the cancer cells are transferred to the cranium through bloodstream and invade the brain tissues, the patient is prone to dizziness, headache and other discomforts, and if it invades the cerebellum, it will also cause instability in walking and impaired sense of balance. 2. Combined with cerebrovascular disease: if lung cancer patients are accompanied by neurological diseases such as insufficient cerebral blood supply, lacunar cerebral infarction, etc., dizziness will also appear. If the patient has abnormal blood pressure, high blood pressure or low blood pressure, it is easy to be accompanied by dizziness. 3. Anemia: chemotherapy or radiotherapy for lung cancer patients can easily inhibit bone marrow hematopoiesis, and some patients will suffer from moderate-to-severe anemia, which will also cause dizziness and fatigue. 4. Malnutrition: Lung cancer patients with advanced stage have poor physique, and even when the tumor invades the digestive tract and affects eating, resulting in serious malnutrition, it may also cause dizziness. When lung cancer patients are accompanied by dizziness, it is recommended to have cranial CT or magnetic resonance examination, monitor blood routine and blood pressure, etc. to find out the cause of the disease and actively follow the doctor’s instruction for treatment.