Gastric reflux may be caused by gastroesophageal reflux, pancreatic dystrophy, bile reflux gastritis and other diseases. 1. Gastroesophageal reflux:Gastroesophageal reflux is mainly caused by factors such as the decline of the anti-reflux defense mechanism of the esophagus, etc. The patient will have symptoms such as heartburn, reflux, epigastric pain, and cough. Therefore, patients will have the manifestation of gastric reflux. 2. Pancreatic achalasia:The cause and pathogenesis of pancreatic achalasia have not been clarified, and it is considered to be caused by various factors such as nerves, heredity, and spirituality. The main symptoms of patients are food reflux, difficulty in swallowing, weight loss, and retrosternal pain, so the patients will have gastric reflux symptoms. 3. Biliary reflux gastritis:The cause of biliary reflux gastritis is still unclear, and it is currently considered to be caused by surgical destruction of the pylorus. Patients will have acid reflux, abdominal pain, abdominal distension, nausea, belching and other manifestations, so patients will have gastric reflux phenomenon. Gastric reflux can also be seen in obesity, abdominal fluid accumulation, esophageal hiatal hernia, etc. When the patient has the symptoms of gastric reflux, he should go to the hospital in time to find out the cause of the disease and follow the doctor’s instructions for treatment.