Eating with a sour mouth may be caused by excessive secretion of stomach acid, gastroesophageal reflux may also cause this symptom, and esophageal mucosal ectasia may also cause eating with a sour mouth. Regular consumption of coffee and strong tea can also stimulate the secretion of gastric acid and cause acidity in the mouth. If the symptoms are not obvious, you can improve the structure of your diet or take drugs to protect the gastric mucosa and acid-suppressing drugs. When the symptoms are more obvious, you can go to the hospital for a stomach examination and make adjustments according to the results. You can’t eat irritating food with a sour mouth, you can eat more coarse food and not too much greasy food. Once also can not eat too much, you can eat six or seven minutes full, to reduce the digestive burden of the stomach and intestines. Can not do sports immediately after meals, especially strenuous exercise, will affect the gastrointestinal digestion, increase the gastrointestinal burden to aggravate the disease. If you eat often with a sour mouth, you can also take herbal medicines that regulate the spleen and stomach.