Thumb sucking is one of the most natural ways young children comfort themselves. Most stop on their own, but when the habit continues as the adult teeth come in, it can change how the teeth and jaws grow. Here is how to tell when to worry, and gentle ways to help your child stop.
Is thumb sucking normal?
Yes. Many babies and toddlers suck a thumb, finger or pacifier, and most stop by about 3 to 4 years old. It becomes more of a concern when it continues past about age 5, and especially once the adult front teeth start to come through, usually around age 6.
How long-term thumb sucking affects teeth
How much it matters depends on how often, how long and how hard your child sucks. Strong, frequent sucking over years may lead to:
- upper front teeth that tip forward and stick out
- lower front teeth that tip backward
- an open bite, where the front teeth do not meet
- a narrow upper jaw and a crossbite at the back
- a tongue thrust habit, as the tongue fills the gap left by the thumb
The good news: if the habit stops early, some of these changes can improve as the child grows.
Signs it may be affecting your child’s teeth
- Front teeth that do not touch when your child bites together
- Upper front teeth sticking out more than before
- Red, wrinkled or calloused skin on the thumb
- Your child still sucks a thumb during the day after starting school
Gentle ways to help your child stop
- Praise, don’t punish. Notice and praise the times your child is not sucking.
- Use a reward chart. A sticker for each thumb-free day or night works well for younger children.
- Find the trigger. Many children suck when tired, bored or anxious. Offer a soft toy, a stress ball or a cuddle instead.
- Keep hands busy during TV time, for example with drawing or building blocks.
- Night-time help. A cotton glove or sock over the hand can act as a gentle reminder.
- Let your child own it. Older children do better when they decide to stop themselves.
When dental help is useful
If the habit continues past about age 6, or the teeth are already changing, your dentist may suggest:
- Myofunctional training and appliances such as Myobrace, which aim to correct tongue and lip habits and guide jaw growth. See our guide to Myobrace in Kepong.
- A habit-breaking appliance fitted inside the mouth as a reminder, in suitable cases
- Braces later, if the teeth have moved a lot
Thumb sucking often goes together with mouth breathing and tongue habits, so your dentist will look at the whole picture.
Book an assessment in Kepong
Our Kepong-area clinics are open 7 days a week:
- Qualiteeth Kepong – 61, Jalan Seri Bintang 2, Taman Sri Bintang
- Qualiteeth Kepong Baru
- Qualiteeth Desa Aman Puri – 2-9A, Jalan Desa 1/3
- Qualiteeth Jinjang Selatan – No. 23, Jalan 8/32, Taman Jinjang Baru
Book an appointment and the branch will confirm your slot on WhatsApp.
Frequently asked questions
At what age should my child stop thumb sucking?
Ideally by around 4 to 5 years old, before the adult front teeth come in at about age 6.
Will the teeth go back to normal after my child stops thumb sucking?
If the habit stops early, mild changes can improve on their own as the child grows. Larger changes may need treatment, such as a myofunctional appliance or braces.
Is a pacifier better than a thumb?
A pacifier can be easier to take away, but long-term use has similar effects on teeth. Aim to stop pacifier use by around age 2 to 3.
This article gives general information and is not a diagnosis. Your dentist will advise on suitable treatment after examining your child.