Stomach disorders do not cause toothache; they are mainly characterized by symptoms of upper gastrointestinal discomfort such as epigastric pain, epigastric bloating, nausea, and vomiting. There may also be symptoms of indigestion, such as acid reflux, belching, regurgitation, regurgitation, early satiety, and so on. If there are complications in patients with gastric disease, there may be corresponding clinical symptoms, such as gastric ulcers and bleeding will show black stools, and there may even be vomiting blood symptoms. If the toothache is considered to be caused by oral diseases, such as dental caries or gingivitis. Of course, for patients with gastric disease may show symptoms of bad breath, but basically do not have a toothache. For the cause of heavy breath, if oral diseases have been ruled out, it is considered to be caused by digestive diseases, such as Helicobacter pylori infection caused by gastric diseases, also often appear in the case of heavy breath.