Gastric cancer is a malignant tumor originating from the epithelium of the gastric mucosa. Gastric cancer is a cancer that occurs in the stomach, usually originating from the gastric mucosal epithelium, and belongs to the most common malignant tumors in the digestive tract. The exact cause of gastric cancer is not clear, and factors such as Helicobacter pylori infection, alcohol, tobacco, and heredity may increase the risk of the disease in patients. Early stage patients may not show obvious symptoms, and as the disease progresses, they may experience symptoms such as weight loss, loss of appetite, epigastric pain and nausea. Gastric cancer is often treated by endoscopic surgery, surgical resection and other surgical treatments, supplemented by chemotherapy and other treatments according to the condition after surgery, and patients who are not suitable for surgery in the middle and late stages can also use targeted drugs and immune drugs to slow down the progress of the disease. It is suggested that patients should consult doctor in time and actively cooperate with doctor to avoid delaying their condition.