Ky Hoa Ky Hoa Dental Odonto-Stomatology Specialty
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Dental care for children

What causes bad breath in children and what should parents do?

A child's breath that smells unpleasant worries many parents. This article explains the causes of bad breath in children, how to care for them at home and when to bring them in for a check.

Key points
  • Bad breath in children is often caused by incomplete cleaning, cavities, gum inflammation or mouth breathing.
  • A mild smell early in the morning is normal and eases after brushing.
  • Brushing and cleaning the tongue morning and night, plenty of water and fewer sweets help reduce bad breath.
  • A smell that lasts, cavities, bleeding gums or a long lasting blocked nose are reasons to bring the child for a check.
What causes bad breath in children and what should parents do?

Many parents hold their child close and suddenly notice an odor on the child's breath, especially in the morning. Bad breath in children is not rare and often has an easy explanation, but sometimes it points to a dental problem or an ear, nose and throat problem that needs a closer look.

Common causes of bad breath in children

  • Incomplete cleaning: leftover food, plaque on the teeth and coating on the tongue are places where bacteria grow.
  • Cavities, especially deep ones with a large hole that traps food.
  • Gum inflammation, with red, swollen gums that bleed easily.
  • Mouth breathing and a dry mouth caused by a blocked nose.
  • Sinus infection, tonsil infection or, more rarely, an object stuck in the nose.

When is bad breath normal?

A mild smell early in the morning is normal because saliva decreases at night. If the smell goes away after brushing and a drink of water, you do not need to worry. You can read more in our article on morning bad breath on waking.

Care at home

  • Teach your child to brush morning and night and to brush the tongue gently. Younger children need help, and the amount of toothpaste should suit the age, see how much toothpaste children need.
  • Give plenty of water and crunchy fruit and vegetables, which help clean the teeth naturally.
  • Limit sweets and sugary drinks, especially before bed.
  • Rinse with clean water after meals if your child is old enough.

When should you bring your child for a check?

Please see a dentist if:

  • The smell lasts even after thorough brushing.
  • There are holes or color changes in the teeth, or the child complains of pain when eating.
  • The gums are red, swollen or bleed.
  • There is a blocked nose, snoring, wheezing or fever at the same time.

If the cause lies in the ear, nose and throat, the dentist will explain and guide you to the right specialist. Our article on the causes of bad breath and how to treat it also has helpful information for the whole family.

You can call the hotline 028.3868.1097 or bring your child in person during working hours at 266A - 268, 3 Thang 2 Street, Hoa Hung Ward, Ho Chi Minh City.

Frequently asked questions

Is bad breath in a child always caused by cavities?

Cavities are one common cause, but poor cleaning, gum inflammation or mouth breathing can also be responsible. The dentist will check to find the real cause.

Should I give my child mouthwash to remove bad breath?

Please do not use it on your own with young children because they can easily swallow it. The safe way is correct brushing and tongue cleaning, and ask the dentist if you want to add anything.

Is mild bad breath in the early morning a problem for a child?

Mild breath in the early morning is usually normal and eases after brushing. If the smell lasts all day, please bring your child for an exam.

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