Gastric cancer may cause painful symptoms, because the typical manifestation is pain in the upper abdomen with burning sensation, nausea and vomiting, and the pain is aggravated after eating. The symptoms of abdominal pain will be more obvious if the gastric cancer grows infiltratively and involves the adjacent organs, especially the pancreatic tissue in the retroperitoneum or the posterior wall of the stomach, and if the patient has metastasis of retroperitoneal lymph nodes and invasion of the nerve plexus. Patients with gastric cancer are also prone to bleeding, which leads to upper gastrointestinal bleeding, and lymph node metastasis, most commonly to the left supraclavicular lymph node. If patients with gastric cancer are diagnosed early, they should choose surgery in time. If advanced patients have obvious pain, they can be given pain relief treatment, including the application of epidural pain pump or intravenous pain pump.