Small cell lung cancer metastasis brain hernia coma is unlikely to recover. Small cell lung cancer is one of the important pathological types of lung cancer, with relatively high degree of malignancy, rapid disease progression, short natural course, and easy to occur metastasis in lymph nodes and bloodstream. Generally, most of the metastasis has already occurred at the time of diagnosis, easy to recur after treatment, and poor prognosis is highly correlated with smoking, and smoking cessation is the primary preventive measure. When small cell lung cancer brain hernia metastasis occurs, it belongs to advanced lung cancer, and brain edema will appear, intracranial pressure will increase, and nerve fiber bundles innervating consciousness in the brain stem will be damaged, leading to cerebral coma. Treatment for this condition is generally unable to contain its condition, so recovery is unlikely. Small cell lung cancer metastasis brain herniation coma is recommended to be treated aggressively under the guidance of a specialist.