Hey! There are preventative and curing solutions. To cure the bad breath you already have, make sure you're brushing your teeth and tongue twice a day- everyday and also floss. When a bad breath arises from stomach problems, stimulating the saliva production really helps keeping the mouth fresh so chew sugar free gum everyday. The other thing is make dietary changes, stop eating foods that have garlic, onions and literally anything that has high sugar content. Keep on doing this religiously for two weeks and it should go away. But don't forget that the bad breath is a consequence of having gut problems and get that treated. Make sure you're eating the right food and stay hydrated. Stay away from stress. I hope that helps!