Thumb sucking is a natural and comforting gesture for many children. However, after a certain age, this habit can have an impact on the development of teeth and jaws.

Why do children suck their thumbs?

• To reassure and calm oneself, especially before going to sleep.

• Because it is a reflex acquired from birth.

• Sometimes to compensate for boredom or anxiety.

Up to what age is this normal?

Before the age of 3 or 4, there are generally no consequences for the teeth. However, if the habit persists after the age of 5 or 6, it can cause:

• teeth that protrude forward,

• a deformed palate,

• occlusion problems (poor jaw closure).

When should you see an orthodontist?

It is advisable to make an appointment if:

• the child keeps his thumb in his mouth very often, even during the day,

• the front teeth appear to be protruding,

• speech or breathing are affected.

How can you help your child quit?

• Praise progress instead of punishing.

• Offer a comfort blanket or other comforting alternative.

• Use fun little tricks (reward charts, games).

• In case of difficulty, the orthodontist can offer gentle and tailored solutions.

At Ortho Belle-vue, we support families with patience and kindness, to transform this stage into a positive, stress-free experience.

✅ In summary

• Thumb sucking is normal up to the age of 3–4 years.

• Beyond 5-6 years of age, risk of dental deformities.

• Consult a doctor if symptoms persist or if there are visible changes.

• Simple and caring solutions exist.