The common complications of advanced gastric cancer, also called progressive gastric cancer, are as follows: 1. local obstruction of the digestive tract, i.e. patients cannot eat, nausea and vomiting; 2. tumor rupture and bleeding, further growth can destroy the four-layer structure of the gastric wall and cause perforation; 3. patients are weak and cannot eat, which in turn can lead to severe anemia and malnutrition, and even cause cachexia; 4. after extensive metastasis of advanced gastric cancer in the abdominal cavity, it can cause cancerous obstruction, resulting in dysfunction of digestive tract passage. Moreover, extensive metastasis of advanced gastric cancer in the abdominal cavity can also cause a large amount of ascites, which can lead to disorder of water-electrolyte acid-base balance of patients; 5. If advanced gastric cancer invades adjacent organs or nerve tissues, it can cause lesions of the corresponding organs, or cause nerve compression and pain, etc.