Avoid eating strong flavoured food to prevent bad breath. If you have just had strong flavoured food, you can try:
Brush your teeth with toothpaste
Use
chewing gum
Rinse with mouthwash
Use breath freshener
Visit a dentist for regular dental check-up
To ensure whether the bad breath is caused by oral diseases such as periodontal disease or dental caries, or whether it is caused by insufficient saliva production; so that appropriate treatment can be given.
Pay attention to your regular oral hygiene practices to prevent oral problems
Brush
your teeth with fluoride toothpaste before bed
at night as well as morning and floss your teeth
daily.
Reduce the frequency of taking food or drinks
Keep
the orthodontic appliances clean by thoroughly
clean them every night and immerse it in a glass
of water when it is not worn.
Quit smoking
If you don't have any oral problem, nor have you eaten anything with a strong flavour, your bad breath may be caused by other medical problems. In that case, you should see a physician to find out the cause and receive appropriate treatment.