Mouth bitterness can be caused by a variety of conditions: First, oral inflammation, when people suffer from chronic gingivitis, dental caries, gum calculus, etc., these oral diseases will cause mouth bitterness, accompanied by oral odor. This time to take oral anti-inflammatory drugs to treat dental caries and remove gum calculus. Second, esophagitis, chronic gastritis, due to poor gastric power exists bile reflux, may also cause mouth bitterness. If the diet is improper, its gastrointestinal function is disordered, the food eaten stays in the stomach and intestines for too long, or too much spicy food is consumed will cause bitter mouth. In this case, we should take oral medicine to promote gastric power, protect gastric mucosa and strengthen stomach and eliminate food. Third, gallbladder inflammation, gallstones caused by, can take some anti-inflammatory and bile tablets.