Cavities in Children: Causes, Prevention & Treatment
Written & medically reviewed by Dr. Rajat Shaikh, MDS — Pediatric & Preventive Dentistry · Last updated July 2026
Cavities in children are caused by plaque bacteria feeding on frequent sugars; they are largely preventable with good brushing, sensible diet, fluoride and sealants — and treatable painlessly when caught early.
Tooth decay is one of the most common childhood conditions — and one of the most preventable.
What causes cavities in kids?
Bacteria in plaque turn sugars into acid that dissolves enamel. Frequent snacking, sugary drinks and incomplete brushing are the main drivers.
What are the signs of a cavity?
- White, brown or black spots on a tooth
- Sensitivity to sweet, hot or cold
- Toothache or food getting stuck
- A hole or broken area you can see
How are children’s cavities treated?
Depending on severity, we use tooth-coloured fillings, a pulpectomy (baby-tooth root canal) or a pediatric crown — all with gentle, child-friendly numbing so treatment is painless.
How can I prevent cavities?
- Brush twice daily with fluoride toothpaste
- Cut down on frequent sugary snacks and drinks — see diet, sugar & kids’ teeth
- Ask about sealants and fluoride
- Keep regular check-ups
Frequently asked questions
Do cavities in milk teeth really need treating?
Yes — untreated decay causes pain and infection and can damage the adult tooth developing underneath, as well as affecting eating and speech.
Does cavity treatment hurt children?
With gentle numbing, behaviour guidance and, when needed, sedation, treatment is painless and calm for children.
Related treatments
Related reading
Ready for a healthier, happier smile?
Book a consultation with Pune’s family-friendly dental team in Mohamadwadi. New patients and children are always welcome.