Eat your breakfast. Hunger breath is very apparent if the morning meal is omitted. Dieting can also make you prone to breath odor, not only because of dry mouth but because when dieters burn stored fat, it gives off acetone which has a medicinal smell. Therefore pay extra attention to oral hygiene and drink plenty of water when on diet. If you are a mouth breather or snore in sleep, your chances of having bad breath are greater because mouth breathing dries out your mouth and lets the bacteria grow and the odors escape.
Some people are mouth breathers because their nasal air flow is somehow chronically obstructed.
For such cases, visit an ear, nose and throat specialist. Develop a right attitude and stop obsessing. Good personality and character is more important. When your self esteem shoots up, your tension goes down, and you won't test positive on the foul breath scale so often. Apply your problem solving skill and use all the newly-found knowledge intelligently will minimize your chances of bad breath and maximize your success rate in all areas of life.