Brain metastasis, pulmonary encephalopathy and electrolyte disorder may be the reasons for late-stage lung cancer patients’ early morning gibberish. 1. Brain metastasis, brain metastasis occurs in advanced stage lung cancer, with the increasing of tumor, it will compress surrounding tissues and nerves, thus affecting the normal function, and finally there will be gibberish, consciousness disorder and other manifestations, which need to be treated with local radiotherapy and surgery for the metastatic lesions. 2. Pulmonary encephalopathy, the lung function of late-stage patients will be damaged to a certain extent, resulting in respiratory failure caused by hypoxemia, a large amount of carbon dioxide stays in the body, coupled with the lack of oxygen, pulmonary encephalopathy will occur, and there will be gibberish, hallucinations and other situations. 3. Electrolyte disorders, such as low sodium, low chloride and other electrolyte disorders, patients will have symptoms of gibberish. It is suggested that if patients with advanced lung cancer have babbling or other symptoms, they should go to the hospital in time and ask for doctor’s advice so as to avoid delaying their condition.