Bad breath is breath that has an unpleasant odor. It's also known as halitosis. This odor can occur from time to time, or it can be long lasting, depending on the cause.

Millions of bacteria live in the mouth, particularly on the back of the tongue. In many people, they are the primary causes of bad breath. The mouth's warm, moist conditions are ideal for the growth of these bacteria. Most bad breath is caused by something
in the mouth