Common Habits That Cause Tooth Decay in Children and How to Prevent Them

Maintaining oral health early in life is crucial. Protecting your child’s first teeth helps safeguard their permanent teeth from decay. According to WebMD, adopting healthy oral hygiene habits during infancy and childhood can significantly reduce the risk of cavities as your child grows.

Habits That Contribute to Tooth Decay in Children

Around 23% of children experience tooth decay before the age of five. Several common habits can increase the risk of cavities, and parents should aim to avoid them:

1. Chewing Gum and Sugary Snacks

Chewing gum and consuming sweets can promote tooth decay. Sugar and acids from bacteria stick to teeth, especially when gum or candies cling to the surface, increasing the risk of cavities.

2. Nail Biting

Some children bite their nails when anxious or stressed. This habit can strain the jaw and even cause functional problems over time. Children may also use their teeth as tools—tearing packaging, biting spoons, or toys—which can weaken teeth and increase the risk of fractures and decay.

Tip: Begin dental visits by age one. For children at higher risk of decay, dentists may apply topical fluoride before all teeth have emerged.

3. Drinking Milk from a Bottle at Bedtime

Feeding a child milk, formula, or other sugary liquids before sleep can cause tooth decay. Sugar left on teeth overnight allows bacteria to produce acids that attack enamel.

4. Brushing Teeth Before Breakfast

Some children brush their teeth first thing in the morning to freshen their breath. However, brushing before breakfast can leave food residues on teeth during the day. Instead, establish a routine of brushing after meals or before starting daily activities.

5. Chewing Ice Cubes

Chewing ice can crack or fracture teeth and increase sensitivity. Explain to your child that this habit can damage their teeth and may contribute to decay over time.

6. Consuming Sugary Foods and Drinks

Candy, chocolate, ice cream, soda, and sweetened juices may bring enjoyment but increase the risk of cavities if oral hygiene is not maintained. Sugar residues form plaque, which bacteria convert into acids that erode tooth enamel. Soft drinks may also contain phosphoric and citric acids, further weakening enamel.

7. Using the Wrong Toothpaste

Using inappropriate toothpaste can increase the risk of decay. Children should use a toothpaste formulated for their age that contains fluoride. Fluoride strengthens enamel and helps prevent cavities.

  • For children under 3 years: use a rice-grain-sized amount.

  • For children 3 years and older: use a pea-sized amount.

By avoiding these habits and establishing proper dental care routines early, you can help protect your child’s teeth and set the foundation for lifelong oral health.


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