Stomach pain involving back pain is mostly seen in gastric ulcer, gastroesophageal reflux, gastric cancer and so on. 1. Gastric ulcer: back pain in patients with gastric ulcer is mostly caused by ulcers on the back wall of the stomach, which will cause radiating pain on the back, especially after improper diet, such as eating spicy and stimulating food, which will easily lead to the attack of gastric ulcer. 2. Gastroesophageal reflux (GERD): It is mainly caused by the reflux of stomach contents into the esophagus, which causes local irritation, mainly heartburn and reflux, and sometimes it may cause back pain. 3. Gastric cancer: it is a kind of malignant tumor occurring in the stomach, early symptoms are not obvious, with the gradual increase of tumor lesions, deep infiltration occurs, which will easily lead to stomach pain and accompanied by back pain. Stomach pain involving back pain may also be caused by gastric ulcer, cholecystitis, heart problems, etc. It is recommended to go to the hospital in time to find out the cause of the back pain and then target treatment.