There are so many causes behind bad breath. If you have any dental problem or gum problem you can suffer from bad breath. The bad breath will become worse when it continues for a long time. In medical science this is called a Chronic Halitosis. The bacteria are the reason behind most of the problem of bad breath. They grow inside the mouth and produces odor while they are having food. This causes the bad breath mainly. If you have any other systemic illness, that can also cause the bad breath problem. Go to the doctor and take the valuable advices from him or her to stop oral malodor.