Eli5: What causes morning breath?



Eli5: What causes morning breath?

In: Biology

Plaque. Bacteria build up on your teeth. Bacteria break down the calcium in your teeth, and when bacteria fart, it smells. Some of the bacteria that thrive on your skin are responsible for BO, for example. The ones in your mouth get a nice block of a few hours to do their worst, until you wake up.

You can also have tonsil stones, wee buildups of bits of food and bacteria in the folds of your tonsils. These are absolutely honking!