A pacifier that keeps falling out is one of the most common frustrations of early parenthood, especially when it disrupts sleep. The fix usually comes down to three things: choosing the right nipple shape for your baby, sizing up as they grow, and understanding that for young infants, some falling out is completely normal. Here’s what actually helps.
Why Pacifiers Fall Out in the First Place
Babies hold a pacifier in place through suction, and that ability develops on a timeline. The sucking reflex doesn’t even begin until around 32 weeks of pregnancy and isn’t fully mature until about 36 weeks. This means premature babies and even some full-term newborns simply don’t have the suction strength to keep a pacifier in reliably. As your baby’s oral muscles strengthen over the first few weeks and months, retention improves on its own.
Beyond suction strength, the pacifier can pop out when a baby relaxes into deep sleep, shifts position, or hasn’t yet developed the tongue coordination to hold the nipple against the roof of the mouth. None of this is a sign that something is wrong. It’s a motor skill that takes time.
Pick the Right Nipple Shape
Pacifier nipples come in three basic shapes, and each one requires a different amount of effort from your baby to hold in place.
- Round (cherry or bulb): Shaped like a natural breast nipple. The baby’s tongue has to cup around the sides and suck harder to flatten it, which can make it easier to lose for babies with weaker suction.
- Symmetrical (drop-shaped): Flatter by design, so the tongue presses it against the palate without as much effort. Babies don’t need to suck as hard, which can help it stay put.
- Anatomical (orthodontic): Has a curved top and angled tip. Like the symmetrical shape, it requires less suction force to flatten inside the mouth, making it a good option for babies who seem to lose round nipples frequently.
If your baby keeps dropping a round pacifier, switching to a symmetrical or orthodontic shape often solves the problem. The reduced suction demand means the pacifier is more forgiving when your baby’s muscles relax. That said, some babies are picky and will only accept a specific shape, so you may need to try a few.
Size Matters More Than You Think
Most pacifier brands sell in age-based sizes, typically 0 to 6 months and 6 to 18 months. A nipple that’s too small for your baby’s mouth won’t create a good seal, and a poor seal means weak suction and more dropping. If your baby is on the larger side or has outgrown the newborn phase, moving up a size can make a noticeable difference. Check the age range printed on the packaging and size up when your baby hits the next bracket.
Material also plays a role. Silicone nipples are firmer and hold their shape, which some babies grip more easily. Latex nipples are softer and more flexible, which can feel more natural but may be harder for a weak sucker to compress effectively. If one material isn’t working, try the other.
Pacifiers With Attached Plush Toys
Products like the WubbaNub attach a small stuffed animal to the pacifier base. The added weight rests against the baby’s chin or chest, which helps anchor the pacifier and prevents it from popping out as easily. Many parents find these dramatically reduce how often the pacifier falls.
There are important limits, though. These products are designed for babies without teeth. Once teeth start coming in, the friction and biting can damage the nipple, creating a choking hazard. Most manufacturers recommend stopping use by 6 months. You should also treat these as supervised-use items. Sleep safety guidelines recommend keeping stuffed animals out of the crib, so a pacifier with an attached plush toy is best for observed naps and awake sucking rather than overnight sleep. Routinely check the nipple for tears by twisting and stretching it in different directions, and throw it out if you find any damage.
What About Pacifier Clips?
A pacifier clip won’t keep the pacifier in your baby’s mouth, but it does keep it from hitting the floor every time it falls out. That means less sanitizing and less hunting for a lost pacifier in the dark. The U.S. Consumer Product Safety Commission recommends clips be no longer than 7 to 8 inches total to reduce strangulation risk.
Clips are a daytime tool only. Remove them before putting your baby down to sleep. Any cord, ribbon, or clip in the crib is a strangulation hazard, regardless of length.
During Sleep, Falling Out Is Fine
This is the part that surprises most parents: you don’t need to keep the pacifier in your baby’s mouth all night. The American Academy of Pediatrics recommends offering a pacifier at nap time and bedtime because it reduces the risk of SIDS, but the protective benefit holds even if the pacifier falls out after your baby is asleep. You do not need to put it back in.
If your baby wakes up crying because the pacifier fell out, you can reinsert it, but there’s no safety reason to keep replacing it throughout the night. Many parents find that once they stop rushing in to replace it, their baby adjusts within a few nights and learns to fall back asleep without it.
When Babies Learn to Do It Themselves
Around 8 months, most babies develop the fine motor coordination to find a pacifier and put it back in their own mouths. This is a turning point. Until then, you’re the one reinserting it every time.
To speed this along, you can practice during the day by handing your baby the pacifier and guiding their hand to their mouth. Some parents scatter two or three pacifiers around the crib at bedtime so a rolling baby is more likely to find one by touch. Once your baby can reliably reinsert it, the “falling out” problem essentially solves itself.
Quick Fixes That Actually Help
If you’ve tried different shapes and sizes and the pacifier still won’t stay put, a few small adjustments can make a difference. Gently pressing the pacifier in and holding it for a few seconds (rather than just placing it in the mouth) gives your baby time to engage the sucking reflex and create a stronger seal. You can also lightly stroke the roof of your baby’s mouth with the nipple before inserting it, which triggers the suck reflex and gets them actively drawing on it right away.
Make sure the pacifier is clean and dry before offering it. A wet or slippery nipple is harder for a baby to grip with their tongue. And if your baby is congested, a stuffy nose forces mouth breathing, which makes holding a pacifier nearly impossible. Clearing congestion with saline drops before offering the pacifier helps more than any product change.
For breastfed babies, the AAP suggests waiting until breastfeeding is well established before introducing a pacifier. That means your milk supply is steady, latching is comfortable, and your baby is gaining weight appropriately. Introducing the pacifier too early can interfere with latch development, and a baby who hasn’t mastered the breast may also struggle with pacifier retention.