Tongue Tie in Newborns: Signs, What It Affects, and When Treatment Makes Sense

Breastfeeding is supposed to click. And then it doesn't — nipples that are sore before the first week is out, a baby who latches and then slips off, a clicking sound every time she sucks. Someone mentions tongue tie. Your pediatrician brings it up at the first visit. Now you're reading about a procedure that involves scissors and a newborn's mouth and wondering how you ended up here so fast.

Tongue tie is real. It genuinely affects some babies' feeding. It is also, according to the American Academy of Pediatrics, one of the most over-diagnosed and over-treated conditions in newborns right now. Understanding both sides of that helps you ask the right questions and arrive at a clearer decision — ideally before anyone hands you a surgical consent form.

01What tongue tie actually is

Tongue tie happens when the lingual frenulum — the small fold of tissue connecting the underside of the tongue to the floor of the mouth — is too short, thick, or tight to allow the tongue to move freely. As Cleveland Clinic describes it, it is a condition where a fold of tissue connects the bottom of the tongue to the floor of the mouth, restricting how well the tongue can lift, extend, or curve. For a newborn learning to breastfeed, those movements matter: the tongue needs to extend over the lower gum, cup around the breast, and create a seal that draws milk out.

According to HealthyChildren.org (AAP), somewhere between 4 and 10 percent of newborns are born with some form of tongue tie. It shows up more often in boys than girls. The severity varies considerably — some frenulums cause obvious movement restrictions; others are mild and may cause no feeding issues at all.

02What it looks like — in your baby and in you

Tongue tie doesn't always announce itself clearly. Some signs are visible only during a careful mouth examination or a watched feeding. Here is what HealthyChildren.org and Cleveland Clinic describe as the most common things to watch for.

• The tongue doesn't extend past the lower gums. When your baby cries or opens wide, the tongue tip stays flat or may notch in the middle, creating a heart or V shape — a classic sign of a tight frenulum.
• Difficulty latching or latching shallowly. The baby may slip off the breast, struggle to create a deep seal, or need to re-latch multiple times during a single feed.
• Clicking sounds during feeding. This happens when the seal breaks repeatedly, often because the tongue can't hold its position. It usually means your baby is swallowing air, too.
• Poor weight gain or very frequent feeding. If your baby is not transferring milk efficiently, they may seem to nurse constantly without gaining at the expected rate.
• Frustration at the breast. A baby who is working harder than usual to get milk may pull away, bob, or seem unsatisfied shortly after feeding ends.

For the person nursing, the most common sign is nipple pain that does not improve as feeding gets established. A shallow latch — often the result of the tongue not being able to cup and draw the breast in properly — leads to cracked, bruised, or persistently sore nipples. Cleveland Clinic notes that these symptoms are nonspecific, meaning they can also come from positioning, milk supply, or other latch issues. That is exactly why an assessment by a lactation consultant matters before assuming tongue tie is the cause.

03Most babies with tongue tie don't have feeding problems

This part is easy to miss in the panic of early breastfeeding. According to a review published in PubMed Central (NIH), five prospective studies found that the majority of infants diagnosed with tongue tie experienced no feeding difficulties at all. One Stanford study found that 82 percent of untreated tongue-tied infants were still breastfeeding at two months, compared to 91 percent of controls — a real difference, but not the all-or-nothing gap many parents expect to hear.

The AAP is direct about this in their report on the rise in tongue-tie diagnoses: "most [difficulties with breastfeeding], including pain, are not due to ankyloglossia." Diagnoses have increased dramatically since the late 1990s, and the AAP is concerned that well-meaning providers — and social media — are sometimes pushing families toward surgery before trying conservative approaches, or before confirming that the tongue tie is actually causing the problem.

04How a proper assessment should work

If your pediatrician or someone at your birth center mentions possible tongue tie, the right next step is a proper evaluation — not a referral straight to a surgeon. The AAP recommends that care be coordinated between a pediatrician and a lactation consultant, and sometimes a speech-language pathologist, with a focus on whether there is a real functional problem and whether non-surgical approaches can address it first.

A thorough assessment includes watching a full feeding — not just looking in the mouth at a single moment. Cleveland Clinic describes the process as evaluating breastfeeding history, examining the tongue and mouth, and directly observing nursing. The goal is to determine not just whether the frenulum appears short, but whether the baby's tongue function during feeding is actually impaired. A frenulum that looks tight but allows enough movement for a solid latch may not need any treatment at all.

05What to try before talking about surgery

For most families, the right starting point is improving the latch with hands-on help from a certified lactation consultant (IBCLC). Positioning changes and latch adjustments address the most common causes of nursing pain and can dramatically improve the situation — even when a mild or moderate tongue tie is present. The AAP's guidance is explicit: frenotomy should be reserved for cases where significant functional impairment is present and nonsurgical interventions have already been tried and have not resolved the problem.

The lingual frenulum may also loosen on its own over the first several weeks. Babies change quickly in the newborn period, and a frenulum that was restrictive at day three sometimes allows enough movement by week four or six that symptoms ease without any procedure. Our guide to the newborn feeding schedule covers how feeding patterns shift across those early weeks and what to expect as things settle.

06When frenotomy is the right call

If you have worked with a lactation consultant, tried positioning changes, given it real time, and feeding is still painful or your baby is not gaining weight as expected, frenotomy is a reasonable next step. Cleveland Clinic describes the procedure's goal as freeing the baby's tongue for a broader range of movement, which can make latching and milk transfer easier. It is a brief outpatient procedure that does not require general anesthesia — typically done with small medical scissors or a laser by a pediatric ear, nose, and throat specialist, dentist, or trained pediatrician.

The evidence is most consistent for one outcome: nipple pain. A Cochrane review cited in the NIH review found that frenotomy reduced breastfeeding mothers' nipple pain in the short term. Its effect on the baby's feeding is less consistent — some infants feed noticeably better right away, others see slower improvement, and in some cases the root issue turns out to be something other than the frenulum. As Cleveland Clinic puts it plainly: if the tongue tie is not what's behind the difficulty, surgery is not likely to help.

07What to do right now

Whether or not a tongue tie turns out to be the cause of your baby's feeding difficulties, the most valuable person in the room is a certified lactation consultant who can watch a full feeding and give you real-time feedback. Problems with pain, latch, milk transfer, and weight gain all share that thread. If you are in the thick of early feeding difficulty and need support overnight or through the newborn weeks, the night help page connects you with professionals who work with exactly these situations.

If your baby is bottle-feeding or you are mixing breast and bottle — whether because of tongue tie, supplementing, or returning to work — paced bottle feeding is the approach that works best for newborns with feeding challenges. It lets your baby control the flow rather than having the bottle pace the feed, which reduces the risk of overfeeding and makes the bottle experience closer to breastfeeding.

Questions parents actually ask

Newborn Weeks is planning help, not medical advice — always follow your own doctor, midwife, or pediatrician.