Why is bad breath caused?

Bad breath is the most common problem among people all of all age groups. Bad breath can give way to unpleasant and embarrassing situations. Ban breath is mainly caused by the leftover food particles in our mouth that acts as a food for the bacteria. Bacteria in our mouth breakdown these food particles and in the process generate a smell which we address as bad breath. Bacteria are generally found in the areas of mouth which is less exposed to oxygen like lower parts of the tongue, pockets between the teeth, etc. Consumption of certain foods like garlic and onions also give way to bad breath.