What's the matter with dry mouth and bitter mouth?

Dry mouth and bitter taste are symptoms of gastroesophageal reflux disease (GERD), which is a relaxation of the sphincter of the lower esophagus caused by various causes. Stomach contents include food, acid, and bile reflux, which is a symptom or complication of esophagus. Severe cases can show mucosal erosion or even ulcers. According to the scope of erosion damage can be divided into A, B, C, D four grades, lying at night when the food back into the esophagus can enter the mouth, reflux disease patients in the next morning can feel dry mouth, bitter mouth, bitter mouth is caused by bile back into the mouth.