What are the preventive methods for children's bad breath?

1. Maintain oral hygiene: brush your teeth twice a day for at least two minutes each time, and use fluoride toothpaste. Rinse your mouth after each meal to remove food residue and bacteria from your mouth.

2. Visit the dentist regularly: check and clean your teeth once every six months or once a year to prevent dental caries and periodontal disease.

3. Healthy diet: avoid eating too much sugar, eat more fruits and vegetables, and keep your mouth moist.

4. Drink plenty of water: drink at least 8 glasses of water every day to keep your mouth moist and help clean.

5. Avoid smoking and drinking: these will increase the risk of bad breath.

6. Chew sugar-free gum: This helps to stimulate saliva secretion and clean the mouth.

7. Don't ignore bad breath: If you find the problem of bad breath, you should seek medical advice in time, find out the reason and treat it.

8. Maintain good living habits: Adequate sleep and moderate exercise will help to improve the overall health of the body, thus reducing the occurrence of bad breath.