Actually the truth is that there are several reasons for the bad breath of mouth. it can be due to bad teeths, bad gums, if you are patient of throat, i can be due to bad stomach or it can be due to not eating properly. there many other reasons as well. now if your bad breath is due to stomach your mouth bad breath will never end by cleaning your teeths because problem is in stomach not mouth. so i will suggest you to contact the Doctor and tell him properly your problem.
I would like to tell some common thing that can be tried to get rid of mouth bad breath.
Clean your teeths properly while cleaning your teeths clean your complete mouth with brush even tongue from both sides. use a good toothpaste for example Fresh up is a great toothpaste for good breath. Use Mouthwash best Mouthwash for good breath is Nefalam.Eat gums that make your mouth fresh. don,t eat onions and carrot. always eat properly with your teeths. drink lot of water everyday. do morning walk. these are basic tips for getting rid of mouth bad breath and if you not get rid of mouth bad breath with these tips contact the Doctor.