If nausea occurs in the late stage of lung cancer, some stomach protecting drugs can be properly used, but it is better to clarify the cause of nausea in patients. In clinical practice, it is possible that patients with advanced lung cancer are prone to intracranial metastasis. After intracranial metastasis occurs, due to the obvious space occupying effect, intracranial hypertension will rise, and patients will have nausea, vomiting, headache, and progressive aggravation of symptoms. At this time, in addition to using some drugs to protect stomach and stop vomiting, dehydration may also be needed to reduce intracranial pressure. Secondly, if patients with advanced lung cancer receive chemotherapy, they will also have toxic and side effects of chemotherapy, and can also show nausea, vomiting and other uncomfortable gastrointestinal symptoms. You can also use some drugs to protect stomach and stop vomiting, so it is recommended that patients should understand the causes of nausea before giving targeted treatment.