Feeling bitter in the mouth and having bad breath should be considered as a result of intestinal flora imbalance or too much liver fire. It is also not excluded that it is caused by the presence of H. pylori infection. You should do some tests to clarify the diagnosis before treatment, generally through the carbon 14 breath test to clarify whether there is a positive H. pylori, confirmed positive should be sterilized with quadruple bactericidal drugs. If H. pylori is ruled out, the bitterness in the mouth may be related to indigestion and can be treated with drugs that promote digestion. The Chinese medicine believes that this condition is caused by too much fire in the stomach or too much fire in the liver, you can choose to use the gentian diarrhea liver pill or use the stomach Huanglian, the specific medication program should follow the doctor’s advice, do not eat too much spicy stimulating or too greasy food recently.