5 Causes of Bad Breath in Kids (And What to Do About It)

Bad breath in kids is more common than many parents realize. While it can be embarrassing, it is often a sign of something simple that needs attention. Understanding the cause is the first step toward fixing it and keeping your child’s smile healthy.

1. Poor Brushing and Flossing Habits

Food particles and bacteria build up quickly in little mouths. If brushing or flossing is skipped or rushed, odor-causing bacteria can linger.

What to do:

• Help your child brush twice a day
• Start flossing as soon as teeth touch
• Supervise brushing until they have good technique

2. Dry Mouth

Saliva helps wash away bacteria. Mouth breathing, dehydration, or sleeping with an open mouth can reduce saliva and lead to bad breath.

What to do:

• Encourage regular water intake
• Address chronic mouth breathing with your pediatric dentist

3. Tooth Decay or Cavities

Cavities can trap bacteria and food, causing ongoing odor even after brushing.

What to do:

• Schedule regular dental checkups
• Treat cavities early to prevent worsening issues

4. Gum Problems

Red or swollen gums can harbor bacteria that cause bad breath. This can happen when plaque builds up along the gumline.

What to do:

• Focus brushing gently along the gums
• Maintain routine dental cleanings

5. Diet Choices

Foods like garlic, onions, and sugary snacks can contribute to bad breath, especially when oral hygiene is inconsistent.

What to do:

• Balance snacks with crunchy fruits and vegetables
• Avoid sugary foods and drinks when possible

Bad breath is usually manageable with consistent care and routine dental visits. If it persists, a dental exam can help identify the cause.

Schedule a Dental Visit for Your Child

If your child struggles with ongoing bad breath, we are here to help. Contact Dr. Naomi La at 617-453-8397 to schedule an appointment at Cedar Brook Pediatric Dentistry in Southborough, MA 01772.