Vomiting may occur in the late stage of lung cancer. In addition to the tumor on the lung, all other systems of the body will have problems in the late stage of lung cancer, especially when the patient is lying in bed for a long period of time, which often affects the intestinal peristalsis, and then intestinal obstruction may occur, which may cause the patient to vomit. If brain metastasis occurs in advanced stage of lung cancer, it is also very likely to cause nausea, vomiting and other symptoms of increased intracranial pressure. Lung cancer in advanced stage may cause abdominal or retroperitoneal lymph node metastasis, and these enlarged lymph nodes are too big to compress the stomach, which may also stimulate the stomach and lead to vomiting. Therefore, when vomiting occurs in advanced stage of lung cancer, in addition to the support of symptomatic treatment, it is usually necessary to find out the causes of vomiting and then carry out targeted treatment according to the causes of the disease.