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One of the biggest concerns we hear from parents is about their child’s thumb sucking habit. Our advice: if they’re under age 4, there’s no need for concern — yet. If they’re older, though, you should be concerned about the possible effect on their bite.

Thumb sucking is a universal habit among infants and toddlers and is related to their swallowing pattern during feeding. As they swallow, their tongue thrusts forward to create a seal with the lips around the breast or a bottle nipple. Many pediatricians believe thumb sucking replicates nursing and so has a comforting effect on infants.

Around age 4, though, this swallowing pattern begins to change to accommodate solid food. The tongue now begins to rest at the back of the top front teeth during swallowing (try swallowing now and you’ll see). For most children, their thumb sucking habit also fades during this time and eventually stops.

But for whatever reason, some children don’t stop. As the habit persists, the tongue continues to thrust forward rather than toward the back of the top front teeth. Over time this can place undue pressure on both upper and lower front teeth and contribute to the development of an open bite, a slight gap between the upper and lower teeth when the jaws are shut.

While late childhood thumb sucking isn’t the only cause for an open bite (abnormal bone growth in one jaw is another), the habit is still a prominent factor. That’s why it’s important that you start encouraging your child to stop thumb sucking around age 3 and no later than 4. This is best accomplished with positive reinforcement like rewards or praise.

If they’ve continued the habit a few years after they should have stopped, we may also need to check to see if their swallowing mechanism has become stunted. If so, we may need to use certain exercises to retrain their tongue to take the proper position during swallowing.

While you shouldn’t panic, it’s important to take action to stop thumb sucking before it becomes a long-term problem. A positive, proactive approach will help avoid costly orthodontic problems later in their lives.

If you would like more information about thumb or finger sucking, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “How Thumb Sucking Affects the Bite.”

One of the most frequent concerns parents express to us is their child’s thumb or finger sucking habit. The good news, though, is that thumb sucking is a completely normal activity for babies and young children, and if they stop by age 4 it should have no adverse effects on their future bite.

In fact, there are positive aspects to thumb sucking: it provides babies with a sense of security, as well as a way to learn about the world. As a child grows and becomes more confident with their surroundings, the thumb sucking habit will fade and eventually stop: for most children this occurs between the ages of two and four.

If, however, the habit continues later in childhood, there is a chance the upper front teeth may be influenced to tip toward the lip during eruption and come into an improper position that could also adversely affect jaw development. The same concern exists for pacifier use — we recommend weaning a child off a pacifier by the time they’re eighteen months of age.

If your child still has a thumb or finger sucking habit as they prepare to enter school, it’s quite appropriate to work on getting them to stop. Punishment, shaming or similar negative approaches, however, aren’t the best ways to accomplish this: it’s much more effective to try to modify their behavior through reward, praise or some creative activity.

Another factor that may help is to begin regular dental visits around their first birthday. Regular checkups give us a chance to monitor the development of their bite, especially if thumb sucking continues longer than normal. We can also assist you with strategies to encourage them to stop thumb sucking or pacifier use.

Thumb sucking that continues later than normal isn’t a cause for panic, but it does require attention and action. Helping your child “grow” past this stage in their life will improve their chances of developing a normal and healthy bite.

If you would like more information on thumb sucking, please contact us to schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “Thumb Sucking in Children.”