What causes bad breath from the stomach?

Another cause of bad breath from the stomach is gastroesophageal reflux disease, or GERD. This condition is caused by acid coming back up the esophagus, causing a burning sensation in the chest or throat. ... It can also cause tooth erosion due to the acid in your stomach carrying into the mouth and weakening your teeth. read more

Usually, the bad breath associated with these is an afterthought, but again, any kind of affliction that causes stomach acid / heartburn / stomach distress will come with an odor (especially if you can taste it -- with taste almost always comes a smell). read more

There are no statistics on what percentage of the population has bad breath. That's because studies usually rely on someone reporting whether or not they think they have bad breath and may not be accurate. But studies show that about 80% of bad breath comes from an oral source. read more

As soon as the mint or toothpaste has worn off, the bad breath is back. Fortunately, most bad breath that is caused by mild stomach disorders can be cured through diet. Stomach disorders such as acid reflux, bowel disorders or even just indigestion can all result in bad breath. read more