6. Sleeping Disorders

Almost everyone has morning breath after a good night’s sleep. This is because we produce less saliva while asleep, which allows odor-producing bacteria to grow at a faster rate.

For those with sleeping disorders like sleep apnea and snoring, this effect can be multiplied, resulting in worse morning breath than normal. This is because they tend to sleep with their mouths open as such disorders can cause difficulty in breathing. As a result, their breath smells really, really, bad!