Reviewed By Dr. Jodi Kuhn
Reading time: 3 minutes
Thumb sucking is common in early childhood and often begins in infancy. While many children stop on their own, ongoing thumb sucking can influence tooth alignment and jaw development. Understanding what happens to your teeth when you suck your thumb helps parents know when the habit may require attention.
We provide dental care for the whole family at our offices in Denver, Aurora, Thornton, and Hampden. We proudly accept Medicaid and make quality dental care accessible for every child.
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At our Denver and Aurora locations, Youth Dentistry & Orthodontics and Youth Vision are conveniently located in the same building. This means your child can receive both dental and vision care at one familiar location, without extra travel or scheduling stress.
What Happens to Your Teeth When You Suck Your Thumb
Thumb sucking can change how teeth and jaws develop when the habit continues past early childhood. The pressure from the thumb rests directly against the front teeth and roof of the mouth, which can slowly shift teeth out of their normal position.
We commonly see the following changes with ongoing thumb sucking:
- Front teeth that tip forward or outward
- Difficulty closing the front teeth together, known as an open bite
- Upper teeth that sit too far ahead of the lower teeth
- Changes in jaw alignment that affect how the bite comes together
These effects vary from child to child. Frequency, intensity, and how long the habit continues all play a role.
How Thumb Sucking Changes Dental Development
The mouth and jaws are still forming during early childhood. Gentle, repeated pressure over time can influence how bone and teeth grow.
Thumb sucking affects development in a few key ways:
- Constant pressure pushes developing teeth forward
- The thumb rests against the palate, which can alter its shape
- Jaw muscles adapt to the sucking motion
- Bite patterns change as teeth erupt into altered positions
These changes happen gradually, which is why the habit may seem harmless until alignment issues become more noticeable.
When Does Thumb Sucking Become a Problem?
Thumb sucking is considered normal in infants and toddlers. Most children naturally stop on their own.
We become concerned when thumb sucking continues:
- Beyond age 3 to 4
- After permanent teeth begin to erupt
- For many hours per day or during sleep
At this stage, we will start monitoring for early bite changes rather than waiting for visible problems to worsen.
Can Thumb Sucking Affect Permanent Teeth?
If it continues as permanent teeth erupt, the habit can influence their final position. This may increase the need for orthodontic treatment later.
Potential long-term effects include:
- Crooked or protruding permanent teeth
- Bite problems that affect chewing
- Narrowing of the upper jaw
The good news is that stopping the habit early often allows teeth and jaws to self-correct as growth continues.
How We Help Children Break the Thumb Sucking Habit
At Youth Dentistry and Orthodontics, we monitor how thumb sucking affects teeth and jaw development during routine exams. If we see early changes in alignment, we discuss them with parents and explain what is happening and why it matters.
Our approach focuses on partnership. Early guidance helps prevent long-term bite concerns.
We may recommend:
- Clear, consistent encouragement at home
- Identifying triggers such as fatigue or stress
- Habit awareness techniques
- A thumb guard if the habit continues during sleep
We tailor recommendations to each child’s age and dental development. When thumb sucking stops early, teeth often shift back toward healthier alignment as growth continues.
Schedule a Dental Visit
If you are concerned about thumb sucking or noticing changes in your child’s teeth, a dental exam can help determine whether the habit is affecting alignment or jaw development.
Contact Youth Dentistry and Orthodontics to schedule an appointment at any of our locations.
📍Denver Youth Dentistry and Orthodontics: 1400 Grove Street, Denver, CO 80204 | (303) 825-2295
📍Aurora Youth Dentistry and Orthodontics: 14251 E. 6th Avenue, Aurora, CO 80011 | (303) 343-3133
📍Thornton Youth Dentistry and Orthodontics: 550 E. Thornton Parkway, Suite 240A, Thornton, CO 80229 | (303) 280-8878
📍Hampden Youth Dentistry and Orthodontics: 7400 East Hampden Ave. Unit C1, Denver, CO 80231 | (720) 826-3694
FAQs
When do babies start sucking their thumb?
Many babies begin thumb sucking before birth. Ultrasounds often show fetuses sucking their thumbs in the womb. After birth, the reflex continues as a natural self-soothing behavior during infancy.
At what age should children stop thumb sucking?
Most children stop naturally by age 3 or 4. Dentists begin monitoring more closely if the habit continues beyond this stage, as ongoing thumb sucking can increase the risk of dental issues as permanent teeth start to develop.
Can teeth fix themselves after thumb sucking stops?
In many cases, yes. When the habit stops early, growing jaws and teeth often move back toward normal positions without intervention. This natural correction supports healthy jaw structure and reduces the likelihood of long-term alignment concerns or effects on speech development.
