Stomach pain, bloating and bad breath may be caused by chronic pharyngitis, gastritis, gastric ulcer and other diseases. 1. Chronic pharyngitis: this kind of people usually do not have the symptoms of stomach pain, bloating, but there is the phenomenon of bad breath, and white granular secretion can be seen in the throat, belonging to the inflammatory secretion, smell may have a bad odor, can be treated by taking pharyngitis tablets. 2. Gastritis: this kind of people may have stomach pain, bloating, bad breath, indigestion, gastrointestinal power insufficiency and other phenomena, can be treated by taking omeprazole acid suppressant, bismuth potassium citrate gastric mucosal protector, gastrointestinal power insufficiency can be treated by taking domperidone. 3. Gastric ulcer: this kind of people can have stomach pain, bloating, bad breath, also can take omeprazole acid suppressant and bismuth potassium citrate gastric mucosa protector for treatment. The above drugs should be used under the advice of a doctor. In case of stomach pain, bloating and bad breath, please go to the hospital in time for diagnosis and treatment.