Hi Priyanka here are some tips to avoid bad breadth-
*You must practice good hygiene habits meaning brush and floss at least twice a day.
*Keep your Tongue Clean: When brushing your teeth, don't forget to brush your tongue. get a tongue scrapper to stop bad breath.
*Eat Vegetables: Eating vegetables such as carrots, apples and celery will clean your tongue. The rough texture of these vegetables will give your tongue just the cleaning it needs to fight bad breath bacteria.
*Drink Tea: Drinking tea can slow the growth of bad breath bacteria. The compounds in the tea work as a wall to block the bacteria.
*Stay Hydrated: Make sure to stay well hydrated as bacteria will emerge when your mouth is dry.
*Eat Parsley: Eating parsley will almost certainly clear up your case of bad breath. It's stocked with tons of chlorophyll which will give off a fresh smell.
*Watch everything you eat: Spicy foods or foods laced with tons of onion and garlic are sure to make your breath unpresentable.
*Use Mouth wash: Make sure to use the right mouth wash. An example of a great mouth wash would be Listerine.