Coughing in the advanced stage of stomach cancer may be due to multiple metastases in the whole body, combined with lung infection and so on. Patients with advanced gastric cancer often have multiple metastases in the whole body, the more common ones are lung metastasis and liver metastasis. When patients with advanced stage of gastric cancer develop cough, it is considered that patients may have lung metastasis, and patients may also have coughing sputum, hemoptysis, chest pain, chest tightness, shortness of breath, back pain, shoulder pain and so on. Patients with advanced gastric cancer have relatively serious condition and low immunity, so they may also have lung infection when coughing, and they may have fever and chest tightness, etc. However, this symptom alone is not enough to diagnose the disease. However, this symptom alone is not enough to diagnose the disease, and it may be caused by other factors. It is recommended that the patient consult a doctor in a timely manner to clarify the cause of the disease and provide targeted treatment.