Toothbrushing at 25–30 months

The short answer

At 25–30 months, an adult should brush teeth last thing at night and on one other occasion. NHS advice is a smear of toothpaste containing at least 1,000 ppm fluoride for children under three. Let your child take a turn, then complete the brushing yourself.

In this guide · 12 sections

Keep in mind

An adult should brush twice daily, including before bed.
Use a rice-sized smear of fluoride toothpaste until age three.
Keep milk and sweet drinks from sitting on teeth overnight.
Arrange dental care for possible decay, pain, swelling, or injury.

How often should you brush?

NHS advice is to brush last thing at night and on one other occasion each day.

An adult should do the brushing at this age, cleaning all surfaces gently.

How much toothpaste should you use?

For a child under three, NHS guidance recommends a smear of toothpaste containing at least 1,000 ppm fluoride.

From three to six, use a pea-sized amount. Keep toothpaste out of reach, encourage spitting, and do not rinse with water after brushing.

Is independent brushing enough?

Your child may enjoy holding the brush but cannot yet reliably clean all tooth surfaces.

Let them try, then brush thoroughly yourself. Adult help and supervision remain necessary well beyond toddlerhood.

Which toothbrush is suitable?

Choose a small-headed toothbrush with soft bristles that is suitable for a young child.

Clean all surfaces gently rather than pressing hard; your dentist can show you a comfortable technique.

Why does bedtime milk matter?

Repeated or prolonged contact with milk or sugary drinks can contribute to tooth decay, particularly when a child falls asleep with a bottle.

Offer milk before brushing. If a drink is needed afterwards, choose plain water rather than letting milk or a sweet drink remain on teeth overnight.

Does frequent snacking affect teeth?

Frequent sugary or starchy snacks can repeatedly expose teeth to acid produced by mouth bacteria.

A regular meal and snack pattern helps; avoid making sweet drinks or constant grazing the everyday routine.

When should dental visits begin?

NHS advice is to begin dental visits when the first milk teeth appear, so the dentist can check and help prevent problems.

If your child has not yet seen a dentist, arrange a visit now and ask how often they should return.

Which changes need a dentist?

Chalky white marks, brown or black discoloration, or visible pits may indicate decay and need dental assessment.

A broken, loose, or displaced tooth, ongoing pain, marked swelling, or a change after an injury also needs prompt dental advice.

What can you do today?

Check that evening milk comes before brushing and that you use only a rice-sized smear of fluoride toothpaste.

Let your child take a turn, then finish brushing. Ask your dentist about cleaning between teeth that touch.

When to seek support

Some signs need emergency help; other concerns can be discussed with your child’s healthcare team.

New white, brown, or black marks or pits on a tooth: arrange dental assessment.
A broken, loose, or displaced tooth or a change after an injury needs prompt dental advice.
Persistent pain or marked mouth swelling needs urgent dental advice; breathing or swallowing difficulty needs emergency help.

Sources used for this guide

English editorial review: 25 October 2026

The English text and regional guidance have been checked editorially. This is not an individual clinical assessment.

Luluna provides general parenting information. It does not diagnose conditions or replace your child’s healthcare professional.

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