Brain metastasis of lung adenocarcinoma is generally not the best situation. Brain metastasis of lung adenocarcinoma indicates that the condition has deteriorated and the cancer cells have spread to the brain, which belongs to advanced stage. Lung adenocarcinoma is a kind of lung cancer, which belongs to non-small cell carcinoma and is a more serious malignant tumor. Early stage may not have any symptom, and with the development of the disease, symptoms such as hemoptysis and coughing up sputum may appear, and if the cancer cells have metastasized to the brain, headache and dizziness may appear. It may also compress the optic nerve and may have symptoms of blurred vision. Early stage lung adenocarcinoma can be removed by surgery. If distant metastasis occurs, it means that the disease has already reached an advanced stage and can only be treated by chemotherapy, radiotherapy or targeted drug therapy, etc., to control the spread of cancer cells, alleviate the symptoms and prolong the survival period. Brain metastasis of lung adenocarcinoma is recommended to go to regular hospitals for consultation and treatment in time.