A tongue tie is a condition present at birth where a short or tight band of tissue under the tongue restricts how far the tongue can move. Between 1.7% and 10.7% of newborns are diagnosed with it, depending on the study and criteria used. The medical term is ankyloglossia, and it ranges from mild cases that cause no problems at all to severe restrictions that interfere with feeding, speech, and oral development.
What’s Happening Under the Tongue
Everyone has a lingual frenulum, the small fold of tissue connecting the underside of the tongue to the floor of the mouth. In a tongue tie, this fold is unusually short, thick, or tight, pulling the tongue downward and limiting its range of motion. The degree of restriction varies widely. Some babies have a thin, translucent band tethering the very tip of the tongue, while others have a thicker, opaque fold anchoring the middle of the tongue to the mouth floor.
Recent anatomical research described in a 2024 American Academy of Pediatrics clinical report clarifies that the frenulum isn’t actually a standalone band of tissue. It’s a dynamic midline fold of a layer of connective tissue beneath the mouth’s lining, extending across the floor of the mouth and attaching to the inner surface of the jawbone. A translucent frenulum is just a mucosal layer, while an opaque one may also contain deeper connective tissue and even muscle fibers. This matters because it means tongue tie can’t be diagnosed by appearance alone. What the frenulum looks like doesn’t always predict how well the tongue actually moves.
How Tongue Tie Is Classified
Clinicians often use the Coryllos grading scale to describe four types of tongue tie based on where the frenulum attaches and how it feels:
- Type I: A thin, elastic frenulum anchors the tip of the tongue to the ridge behind the lower teeth. This is the most visible type.
- Type II: A fine, elastic frenulum attaches 2 to 4 millimeters behind the tongue tip to the floor of the mouth near the lower gum ridge.
- Type III: A thick, stiff frenulum anchors the middle of the tongue’s underside to the mouth floor.
- Type IV: The frenulum is set far back or isn’t visible at all, but an examiner can feel tight fibers anchoring the tongue when pressing the area with a fingertip. The floor of the mouth may look shiny or feel thickened.
Types I and II are sometimes called “anterior” tongue ties because the attachment point is near the front. Types III and IV are “posterior” ties and can be harder to spot during a routine exam. A separate tool called the Hazelbaker Assessment evaluates not just where the frenulum attaches but how well the tongue actually functions, including whether it can lift, extend, and cup properly during feeding.
Signs in Breastfeeding Babies
Tongue tie most commonly comes to attention during breastfeeding. A baby needs to extend and elevate the tongue to latch deeply onto the breast and transfer milk effectively. When the frenulum is too restrictive, the tongue can’t do its job, and both the baby and the breastfeeding parent feel the consequences.
In the baby, signs include difficulty latching at all, crying or fussing when trying to latch, clicking sounds during feeding, or repeatedly popping off the breast. Some babies latch but can’t transfer milk well, leading to poor weight gain, unusually frequent feedings, and few or no audible swallowing sounds. The tongue itself may look heart-shaped or have a visible notch at the tip when the baby cries or tries to stick it out.
For the breastfeeding parent, the impact can be significant: cracked and sore nipples, persistent pain during nursing, and in some cases, a drop in milk supply if the baby’s poor transfer continues over time. These symptoms overlap with other breastfeeding challenges, which is why the AAP recommends working with lactation support first to rule out positioning or latch issues that aren’t caused by the frenulum.
Effects in Older Children and Adults
Not all tongue ties cause noticeable problems in infancy, and some people don’t realize they have one until childhood or adulthood. The effects tend to show up in specific ways as oral demands change.
Speech is one of the more common concerns. A restricted tongue can make it difficult to produce sounds that require the tongue to touch or approach the roof of the mouth or the back of the upper teeth. The sounds most often affected are “t,” “d,” “z,” “s,” “th,” “n,” and “l.” Not every child with a tongue tie develops a speech issue, but when articulation problems persist despite speech therapy, a restrictive frenulum is worth evaluating.
Dental health is another area of impact. The tongue normally sweeps food debris off the teeth throughout the day. When it can’t reach all surfaces of the teeth effectively, food particles linger, raising the risk of tooth decay and gum inflammation. Everyday activities can also be surprisingly affected. Licking an ice cream cone, licking your lips, kissing, and playing wind instruments all require tongue mobility that a tight frenulum limits.
When Treatment Is Recommended
The key distinction in the AAP’s 2024 clinical guidance is between anatomic tongue tie and symptomatic tongue tie. Plenty of people have a short or tight-looking frenulum that causes no functional problems whatsoever. Treatment is generally considered only when there’s a physical exam consistent with a restrictive frenulum combined with feeding difficulties that haven’t improved with lactation support, or (in older individuals) speech or dental issues clearly linked to restricted tongue movement.
This distinction matters because diagnoses of tongue tie have risen sharply in recent years, and there’s ongoing debate about whether some infants are being treated unnecessarily. The AAP emphasizes that appearance alone doesn’t warrant intervention.
What the Procedures Involve
Two main surgical approaches are used to release a tongue tie. The simpler one, called a frenotomy, involves cutting the frenulum with sterile scissors or a laser. For infants, this is typically quick, and many babies can breastfeed immediately afterward. The more involved procedure, a frenuloplasty, is used when the frenulum is thicker or when a more precise repair with stitches is needed. It’s more common in older children and adults.
Laser procedures tend to be faster and cause less discomfort. In one comparative study, laser release took about 7 minutes on average versus 15 minutes for a surgical frenuloplasty. Patients in the laser group reported pain levels around 2 out of 10 at the 24-hour mark and zero pain by 48 hours, compared to pain levels of 5 at 24 hours and 2 at 48 hours with the surgical approach. The laser group also had no swelling and required no stitches.
Recovery for infants after a simple frenotomy is typically rapid. Some fussiness and minor discomfort are normal in the first day or two. For older children and adults undergoing a more extensive release, the recovery window is longer, and stretching exercises are often recommended afterward to prevent the tissue from reattaching as it heals. Speech therapy may also be needed following the procedure if compensatory speech patterns have already developed.