Stomach pain with back pain is associated with duodenal ulcer, gastric cancer, and pancreatitis. The location of the duodenum is near the lumbar vertebrae. When ulcers appear in the mucosa of the duodenum, when it comes in contact with gastric acid, it will cause spasmodic contraction of the smooth muscles of the duodenum, which will not only involve the stomach, but also lead to soreness in the back area. Stomach cancer is a malignant disease, especially in the middle and late stages, the blood vessels in the stomach will be damaged by the invasion of cancer cells, which will not only lead to symptoms such as vomiting blood and black stool, but also pain in the stomach is a very obvious symptom. Once the cancer cells invade the nearby pancreatic tegument, pain radiating to the lower back will also occur as a result. Pancreatitis is a post-membranous organ, and this disease is directly related to excessive intake of fatty foods and excessive alcohol consumption, and the onset of pancreatitis is dominated by severe pain. In addition to the invasion of the stomach, the pain also radiates to the back of the shoulders, and many patients experience a sensation of the lumbar back binding at the same time, which leads to low back pain.