The causes of bitter mouth and bad breath are most closely related to gastrointestinal and gallbladder diseases. However, when the stomach function is weakened, or the symptoms of stomach fire, it is likely that the client will have bad breath. Especially after eating spicy food, and greasy food, or have often do not stool, there will often be bad breath cause. If accompanied by gallbladder, inflammation or gallbladder function, bile reflux into the stomach, the symptoms of bitter mouth will appear. If you have a long-term bitter mouth and bad breath, you can first do some tests for gallbladder and stomach diseases. Gastroscopy and hepatobiliary ultrasound can be done to quickly clarify the cause. If it is clear that the cause is due to gastrointestinal dysfunction and food accumulation in the gastrointestinal tract, you can first use some gastrointestinal motility drugs and digestive drugs, such as domperidone and other drugs such as multi-enzyme tablets, which can effectively relieve the bitterness and bad breath caused by food accumulation in the gastrointestinal tract. If accompanied by chronic inflammation of the gallbladder, you can first use anti-inflammatory drugs, such as quinolone anti-inflammatory drugs, continuous treatment for a period of time, bitter and bad breath symptoms can be relieved. If the bad breath is clearly caused by gastrointestinal tract and gallbladder diseases, gastrointestinal motility drugs and anti-inflammatory drugs can be used for timely treatment.