Brain infarction does not lead to lung cancer, etc. Cerebral infarction is a cerebrovascular disease, which leads to the death of brain cells after the blood flow of blood vessels is interrupted, causing patients to have unfavorable body movement or clumsy speech, choking and coughing with water, dizziness, visual field loss, walking balance disorder, double shadow when looking at things, which are related to mental symptoms. Lung cancer is a malignant tumor disease that originates from the bronchial mucosa or glands of the lung. The causes of lung cancer may be related to the patient’s poor lifestyle, such as smoking, air pollution, ionizing radiation, heredity, history of lung diseases, etc.