Bile reflux may cause back pain. Bile reflux is mostly due to the relaxation of the pyloric sphincter of the stomach. When the pyloric sphincter becomes relaxed, the bile from the duodenum flows back into the stomach, which leads to the damage of the gastric mucosa, i.e., the appearance of bile reflux gastritis. The disease may present with shoulder and back pain, which is caused by abdominal pain and involuntary pain, and may also present with clinical symptoms such as abdominal distension, acid reflux, heartburn, nausea and vomiting, etc. It is recommended to improve gastroscopy to further clarify the diagnosis. In the treatment of bile reflux gastritis, first of all, we should have a regular diet, mainly light diet, do not overeat, quit cold and stimulating, spicy and greasy food; also under the guidance of gastroenterologists oral gastric power, inhibit gastric acid, gastric mucosa protection drugs, such as domperidone, omeprazole, bismuth pectin, and so on. If you have any symptoms of discomfort, you should go to the hospital in time, consult the physician’s guidance, and follow the doctor’s instructions for medication.