For the cause of bad breath in the morning, may be due to sleep at night can not be timely hydration, the mouth is dry inside and lead to bad breath, this situation can be in the morning after waking up a glass of warm water or honey water, so that the mouth moistened, because of dryness and bad breath can be solved. It may also be caused by incomplete oral hygiene, some times although the night before going to bed has been brushed. But some of the food residue in the teeth is not cleaned out, after a night of fermentation, decay, will also give off bad odor, in this case it is recommended to do a thorough cleaning of the mouth every day, in addition to brushing, but also need to use dental floss, toothbrush and other tools to clean the mouth as much as possible.