What symptoms should be alerted three days before death of advanced gastric cancer is not scientific, and there is no specific symptom, which may be malignant, abdominal pain and blood pressure drop, etc., or local lesions may cause eating difficulty and metastatic symptoms. 1. Malignant manifestations, due to the dietary energy supply is insufficient, mainly manifested as loss of appetite, emaciation, fatigue, weight loss and other malignant manifestations, and even in the end stage of the disease, the patient is severely emaciated, showing the skin and bones. 2. Abdominal pain and blood pressure drop, the main symptom in the late stage is still epigastric pain, but the pain is more intense, more obvious than in the early stage, and lasts longer, and there can be vomiting of blood, black stools, etc. When there is a large amount of vomiting of blood, there can even be a drop in blood pressure, and the situation of hemorrhagic shock. 3. Local and metastatic symptoms, local symptoms of advanced gastric cancer such as difficulty in eating, nausea, vomiting and so on. Late gastric cancer can cause metastasis to other parts, such as liver metastasis, which manifests right upper abdominal pain. Peritoneal metastasis will show ascites and so on. As advanced stomach cancer is life-threatening at any time, it is recommended to go to the hospital for consultation and timely treatment.