Many babies start sucking their thumb or fingers as early as the womb – sometimes it can even be spotted on a scan! It’s a natural reflex and a way for babies to comfort themselves.

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Is thumb sucking normal?

Yes – it’s completely normal. Babies and toddlers often put their fingers or toys in their mouths as a way to explore the world.

Most children stop sucking their thumb or fingers naturally between the ages of 2 and 4. But some might carry on when they feel:

• Tired.
• Stressed.
• Anxious.

If the habit stops by around age 7, their teeth will usually grow into the right position on their own. However, research shows that 1-in-8 children aged 7-11 still suck their thumb or fingers.

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What problems can it cause?

If thumb or finger sucking carries on past early childhood, it can lead to problems with the teeth and mouth. These might include:

• Crooked or misaligned teeth.
• Changes to how the top of the mouth (palate) develops.
• Trouble chewing or swallowing.
• Speech difficulties.
• Irregular wear on the teeth.
• Sore or chapped skin on the fingers or thumb.
• Confidence issues due to teasing at school.
• Related habits like hair twirling or pulling may cause hair loss.

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How to stop thumb sucking

It’s best to encourage your child to stop thumb or finger sucking by age 4 to avoid dental issues.

Breaking the habit can be hard, but some tools can help:

• Thumb or finger covers (made of fabric or silicone).
• Foul-tasting nail paint (choose a child-safe, non-toxic version and apply as directed).
• Velcro or locking devices to discourage sucking.

Tip: Choose a method that suits your child’s personality. Some very determined thumb suckers might still find ways around these tools – so gentle supervision may be needed.

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What about dummies?

Try to avoid using dummies if you can. They can cause the same problems with tooth development as thumb sucking.

If your child does need a dummy:

• Choose one with an orthodontic teat to reduce the risk.
• Never dip dummies or teething rings in sweet things like honey, fruit juice or syrups –especially at night. This can lead to tooth decay in baby teeth.

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Need help?

If you’re worried about your child’s thumb sucking or dummy use, talk to your dental team. They can give advice and suggest ways to support your child in stopping the habit.