While bad breath might be a symptom of something else, it most likely originates from tooth decay and periodontitis. Periodontitis is a disease that affects gums and bone that support the teeth, and it results from inadequate tooth brushing and flossing. In this disease, the irritated gums pull away from the teeth and form pockets between the teeth and the gums. These pockets get filled with bacteria which give off an unpleasant odor. If you have chronic bad breath, you need a complete dental evaluation. If gum disease and/or dental decay are diagnosed, it can and should be treated readily. The patient will no longer have to deal with an infection in his or her mouth, and they will no longer have the embarrassment of bad breath.