Pacifier use does increase the risk of ear infections in young children, though the effect is moderate. Children who use pacifiers are roughly 1.5 times more likely to develop acute middle ear infections compared to those who don’t, and the risk climbs with age and duration of use. The good news: limiting when and how long your child uses a pacifier can meaningfully reduce that risk.
How Pacifiers Affect the Ear
The connection between a pacifier and the middle ear comes down to a small channel called the eustachian tube, which connects the back of the throat to the middle ear. This tube’s job is to equalize pressure and drain fluid from the middle ear. Repetitive sucking on a pacifier changes the pressure balance between the throat and the middle ear, which can impair the tube’s ability to open and close properly. When fluid gets trapped behind the eardrum instead of draining, bacteria have an ideal environment to multiply, leading to infection.
Pacifiers also carry bacteria directly. One study examining pacifiers from infants with ear infections found microorganisms on more than half of them, including several types of bacteria commonly found in the mouth and upper respiratory tract. Regular sterilization helps, but any object that goes in and out of a child’s mouth repeatedly throughout the day is difficult to keep clean.
How Much the Risk Increases
The size of the risk depends on which study you look at and how it was measured, but the pattern is consistent. In infants 12 months and younger, one study found ear infections in 36% of pacifier users compared to 23% of non-users, roughly doubling the odds. A large meta-analysis put the number more conservatively: pacifier users were 1.17 times more likely to develop any form of middle ear disease and 1.54 times more likely to develop acute ear infections specifically.
For context, other common risk factors carry similar or greater weight. The same research that found pacifiers doubled the risk also found that bottle feeding and daycare attendance each increased the risk by about five times. So while pacifiers are a real contributor, they’re a smaller piece of the puzzle than factors like group childcare or how a baby is fed.
Age Makes a Big Difference
Ear infection risk from pacifier use isn’t evenly spread across childhood. It increases as children get older. In children younger than 2, about 29.5% of pacifier users had three or more ear infections compared to 20.6% of non-users. But in the 2-to-3 age group, that gap widened dramatically: 30.6% of pacifier users versus just 13.2% of non-users, nearly tripling the risk.
This timing matters because it lines up neatly with another major concern. Pacifiers appear to lower the risk of sudden infant death syndrome (SIDS), and SIDS risk is highest in the first six months of life. During that same window, ear infections are at their lowest. So for young infants, the protective benefit against SIDS likely outweighs the small increase in ear infection risk. After 6 months, and especially after 10 to 12 months, the calculus shifts. Researchers who studied the age-based pattern suggest that pacifiers ideally should be limited to the first 10 months, when the need for non-nutritive sucking is strongest and ear infections are least common.
Limiting Use Without Eliminating It
You don’t necessarily have to go cold turkey. A randomized controlled trial found that children whose parents restricted pacifier use to only the moments when the child was falling asleep had 33% fewer ear infection episodes than children who used pacifiers continuously throughout the day. That’s a substantial reduction from a relatively simple change.
The practical takeaway: if your child is over 6 months old and prone to ear infections, try reserving the pacifier for naps and bedtime only. This preserves its soothing benefit during sleep while cutting back on the hours of repetitive sucking that affect eustachian tube function. Weaning between 6 and 12 months may reduce ear infection risk further.
Keeping Pacifiers Clean
Before using a new pacifier for the first time, sterilize it by placing it in boiling water for five minutes and letting it cool completely. After that, wash it with hot, soapy water after each use. Avoid “cleaning” a dropped pacifier by putting it in your own mouth, which transfers adult oral bacteria to your child. Replace pacifiers regularly, especially if the silicone shows signs of wear, cracking, or discoloration, since damaged surfaces harbor bacteria more easily.
Thumb Sucking as an Alternative
If you’re wondering whether switching to thumb sucking avoids the ear infection issue, the evidence is unclear but leaning toward yes. A systematic review examining multiple studies found that four out of five studies showed no significant association between thumb or finger sucking and ear infections. Only one study reported a link, and the authors speculated it might apply only to infants under 12 months. There wasn’t enough consistent data to draw firm conclusions, but thumb sucking does not appear to carry the same ear infection risk that pacifiers do. It does, however, come with its own downsides for dental development, and it’s harder for parents to control since you can’t take a thumb away.
Putting the Risk in Perspective
Pacifiers are one of several modifiable risk factors for ear infections, but they’re not the largest one. Daycare attendance, bottle feeding position, exposure to cigarette smoke, and seasonal respiratory viruses all play significant roles. If your child is getting frequent ear infections and still using a pacifier past their first birthday, cutting back or weaning off is a reasonable step, especially since the natural need for non-nutritive sucking declines around that age anyway. For infants under 6 months, the SIDS-prevention benefit gives pacifiers a favorable risk profile, and ear infections during that window are uncommon to begin with.