While most of us don't know the basic of acquiring halitosis or bad breath, it should be learned that the cause of bad breath is bacteria growing on food that accumulates between the teeth, on the tongue and around the gums. Basically, oral care routine like brushing the teeth and tongue and flossing eliminates the growth of this bad-breath-causing-bacteria. Mouthwashes may help but they often don't penetrate into the crevices of the tongue. Avoid regular use of breath freshening mints containing the artificial sweetener aspartame, which tastes peculiar and has been linked with headaches in some people. Persistent bad breath (or a bad taste in the mouth) can be a warning sign of gum disease that is why regular dental checkups is urgent as well to compliment your oral hygiene.