To fix your bad breath and get rid of bad breath make sure to brush your teeth often such as 3 to 4 times per day and brush your tongue as well.
Then also use some mouthwash to swish in your mouth 2 to 3 times per day.
Another thing you should do is have a professional dental and tooth cleaning as the dentist can clean your mouth and teeth, gums etc and get rid of bacteria in your mouth.
That can help to get rid of bacteria and bad breath.
Drink plenty of water and swish cool water around in your mouth. This is especially helpful to freshen “morning breath.”
Brush after every meal and floss, preferably twice a day.
Replace your toothbrush every two to three months.
Arrange regular dental checkups and cleanings.
Scrape your tongue each morning with a tongue scraper or spoon to decrease the bacteria, fungi, and dead cells that can cause odor.
Chew a handful of cloves, fennel seeds, or aniseeds. Their antiseptic qualities help fight halitosis-causing bacteria.
Chew a piece of lemon or orange rind for a mouth- freshening burst of flavor. (Wash the rind thoroughly first.) The citric acid will stimulate the salivary glands—and fight bad breath.
Chew a fresh sprig of parsley, basil, mint, or cilantro. The chlorophyll in these green plants neutralizes odors.
Try a 30-second mouthwash rinse that is alcohol-free (unlike many off-the-shelf products). Mix a cup of water with a teaspoon of baking soda (which changes the pH level and fights odor in the mouth) and a few drops of antimicrobial peppermint essential oil.