Sucking is one of a baby's earliest comforts. Many babies suck their thumbs before they're even born. So if your little one loves a thumb or a pacifier, you're in good company, and in the early years it's completely normal.
The question most parents ask us is: when does it start to matter for their teeth?
Why babies suck
Sucking is a natural reflex. It helps babies feel safe, calm down, and fall asleep. Most children stop on their own somewhere between ages 2 and 4.
When can it affect teeth?
Thumb-sucking and pacifier use usually don't cause lasting problems in babies and toddlers. Concerns grow when the habit continues past about age 3 or 4, and especially once permanent teeth start coming in, around age 6.
Over time, frequent or long-lasting sucking can:
Push the upper front teeth forward and the lower ones back
Create an open bite, a gap where the front teeth don't meet when biting down
Narrow the upper jaw, which can cause a crossbite
Affect speech, such as a lisp
How a child sucks matters too. A thumb resting loosely in the mouth does much less than vigorous sucking with a lot of pressure. Children who suck hard may have visible changes sooner.
We check for all of this at your child's regular visits, so you'll know early if the habit is starting to affect their bite.
Thumb vs. pacifier: is one better?
Both can affect teeth in similar ways. The main difference is that a pacifier can be taken away; a thumb can't. That often makes pacifiers easier to wean from.
Pacifiers also have a benefit for young babies: the American Academy of Pediatrics notes that offering a pacifier at naptime and bedtime can lower the risk of sudden infant death syndrome (SIDS). Talk with your pediatrician about pacifier use in the first year.
Pacifier safety tips
Never dip a pacifier in sugar, syrup, juice or honey. Sugar causes cavities, and honey is never safe for babies under 1.
Don't "clean" a pacifier in your own mouth. It can pass cavity-causing bacteria to your baby.
Replace pacifiers that are cracked, sticky or torn.
Never tie a pacifier around your baby's neck or crib.
Gentle ways to help your child stop
For most children, gentle and positive works best:
Praise, don't punish. Notice and celebrate the times your child doesn't suck.
Find the trigger. Many children suck when tired, bored or anxious. Offer a cuddle, a toy or a soothing routine instead.
Try a reward chart. Stickers for each day or night without sucking work well for preschoolers.
Use gentle reminders, like a bandage on the thumb or a soft glove at night, framed as a helper, not a punishment.
Cut back on pacifiers gradually: first only at sleep, then not at all. Some families make a "goodbye" event of it, such as leaving pacifiers for the "pacifier fairy."
Let your child be part of the plan. Older children often do best when stopping is their own idea.
Avoid shaming, scolding or harsh methods. They tend to increase anxiety, which can make the habit stronger.
When to talk to us
Ask us at your child's next visit if:
Your child is still sucking a thumb or pacifier regularly after about age 4
You notice the front teeth sticking out or not meeting
Your child has speech concerns
You've tried to help them stop and it isn't working
Sometimes simply hearing it from the dentist, kindly, makes all the difference. If needed, we can talk about other options.
Have a question about your child's habit? Request an appointment at our Middletown or West Dover office, or call (302) 376-3750 (Middletown) or (302) 734-0330 (West Dover).