Lip Tie vs Tongue Tie: How They Differ and What to Do

Lip ties and tongue ties are two separate conditions that are often mentioned together, sometimes confused for each other, and frequently the source of real frustration for parents of infants who are struggling to breastfeed. Both involve an unusually tight or thick band of tissue connecting the lip or tongue to the mouth structure, and both can affect feeding, speech, and dental development when they are significant. Understanding the lip tie vs tongue tie distinction is the first step toward knowing whether either one is actually causing a problem and what, if anything, should be done about it.

At Willow Family Dentistry in Wylie, TX, Dr. Esther B. Jeong evaluates lip ties and tongue ties as part of pediatric dental care and can help families navigate the assessment and decision-making process with current, evidence-informed guidance.

What Is a Tongue Tie?

A tongue tie, clinically called ankyloglossia, is a short or tight lingual frenulum that restricts how far and how freely the tongue can move. It affects roughly 4 to 11% of newborns and ranges from mild with no functional impact to severe with significant feeding and speech effects.

A tongue tie, clinically called ankyloglossia, involves the lingual frenulum. This is the small band of tissue connecting the underside of the tongue to the floor of the mouth. When it is unusually short, thick, or tight, it restricts the tongue's range of motion. The tongue normally has significant freedom to lift, extend, and move side to side; a tongue tie limits this mobility to varying degrees.

Tongue tie affects somewhere between 4% and 11% of newborns, according to research on its prevalence, making it one of the more common oral anatomical variations seen at birth. It occurs more frequently in males than females at roughly a 3:1 ratio, according to that body of research. The condition ranges widely. At the mild end, the restriction is barely noticeable and causes no functional problems. At the severe end, the tongue cannot lift at all and a visible notch or heart shape appears at the tongue tip from the pull of the tissue.

Not every tongue tie causes problems. Many children with mild ankyloglossia breastfeed effectively, develop normal speech, and never require treatment. The clinical question is not whether a tongue tie is present but whether it is causing a specific, measurable functional problem that treatment would resolve.

What Is a Lip Tie?

A lip tie is a tight or low-attaching labial frenulum that restricts the upper lip from flanging outward to create a seal. It is graded on a scale of 1 to 4 based on how far down toward the teeth the attachment extends, with higher grades associated with greater restriction.

A lip tie involves the labial frenulum, the band of tissue connecting the upper lip to the gum. When this tissue is unusually thick, tight, or attaches too far down toward the gum line, it restricts the lip from flanging outward to create a seal. A normal upper lip frenum attaches high on the gum, well away from the teeth; a significant lip tie attaches closer to or between the front teeth.

Lip ties are graded 1 to 4 based on how far down the attachment extends. Grade 1 is a mucosal attachment at the gum. Grade 2 extends to the gingival tissue. Grade 3 reaches the base of the interdental papilla between the front teeth. Grade 4 wraps into the palate. Higher grades are associated with greater restriction and more noticeable functional impact.

According to Healthline, a lip tie on its own rarely causes significant problems in older children and adults but is most clinically relevant in newborns and infants where the lip's ability to create a seal during breastfeeding directly affects feeding efficiency and maternal comfort.

How Are Lip Ties and Tongue Ties Different?

The key difference is location and function: a tongue tie limits tongue movement and affects milk transfer and speech, while a lip tie limits upper lip flanging and affects the feeding seal. Both can occur together in the same child, and tongue tie is generally the higher priority when both are present.

The key difference between a lip tie and a tongue tie is their location and function: a tongue tie restricts tongue movement and affects how milk is transferred during breastfeeding and how sounds are produced in speech, while a lip tie restricts upper lip flanging and affects how well a baby can create an effective seal around the breast or bottle.

The table below summarizes the main distinctions:

	Tongue Tie	Lip Tie
Tissue involved	Lingual frenulum (under tongue)	Labial frenulum (upper lip to gum)
What it restricts	Tongue lift, extension, lateral movement	Upper lip flanging and seal
Feeding impact	Milk transfer, latch, nipple compression	Seal, fatigue, clicking sounds
Speech impact	t, d, l, r, s, z sounds	m, b, p sounds (less common)
Dental impact	Lower arch crowding in some cases	Gap between upper front teeth (diastema)
Prevalence	4-11% of newborns	Less consistently studied; varies

When both conditions are present, this lip tie vs tongue tie combination is typically addressed in order of functional priority. Both conditions can coexist in the same child. When both are present and both are symptomatic, treatment of the tongue tie is generally prioritized because the tongue plays a more central role in feeding mechanics than the lip.

How Do You Know If Either Is Actually Causing a Problem?

The presence of a lip or tongue tie alone does not mean treatment is needed. What matters is whether the restriction is causing a specific, documentable functional problem that conservative management cannot resolve. For infants, the functional concern is usually breastfeeding; for older children, it is typically speech.

The presence of a lip tie or tongue tie alone does not mean treatment is needed. What matters is whether the restriction is causing a specific functional problem that conservative management cannot adequately address. For infants, the most important functional concern is whether breastfeeding is affected, and that determination is best made by assessing both the anatomy and the actual feeding behavior together, ideally with an International Board Certified Lactation Consultant (IBCLC) involved in the evaluation.

Signs that a tongue tie may be functionally significant in a newborn include: poor latch with repeated slipping off the breast, maternal nipple pain or damage, milk supply concerns due to inefficient transfer, clicking sounds during feeding, excessive feeding time without adequate intake, and a baby who tires quickly at the breast. Many of these signs also have other causes, which is why a full feeding assessment rather than anatomy alone drives the decision.

Signs that a lip tie may be contributing to feeding difficulty include a baby who cannot flange the upper lip outward around the breast, excessive swallowing of air during feeds, gassiness, and a visible gap between the upper gum and the lip during feeding. A lip tie that causes no feeding symptoms is rarely a reason to intervene in infancy.

What Is a Frenectomy and What Does the Procedure Involve?

A frenectomy is the release of the restrictive frenulum tissue, either by cutting or by using a soft-tissue laser. Laser frenectomy has become the most widely used approach in pediatric dental settings because it is fast, precise, produces minimal bleeding, and allows the provider to see and control the release clearly throughout the procedure.

The procedure itself typically takes a few minutes. In newborns and young infants, topical anesthetic or local anesthesia is typically sufficient. The release creates a small diamond-shaped wound that heals over days to weeks. Post-procedure, stretching exercises are typically recommended to prevent the tissue from reattaching as it heals, which is the most common reason for an incomplete result if the aftercare protocol is not followed.

For older children and adults, full local anesthesia is used. The recovery for older patients typically involves a few days of mild soreness and avoidance of hard foods, with the wound fully healed within one to two weeks in most cases.

Is Laser Frenectomy Always the Right Answer?

Laser frenectomy is not always the right answer, and visible frenulum anatomy alone is not an indication for procedure. The decision should rest on documented functional symptoms, a full feeding assessment, and ideally input from a lactation consultant before proceeding with any release in an infant.

Laser frenectomy is not always the right answer, and the decision to proceed deserves honest clinical judgment rather than the assumption that any visible frenulum is a problem requiring release. There is genuine medical debate about the threshold for treating tongue ties and lip ties in infants, and the research supports intervention when there is a clear, documented functional problem rather than anatomical appearance alone.

The American Academy of Pediatric Dentistry, whose resources for parents are available at aapd.org, emphasizes that treatment decisions should be made based on clinical symptoms and functional assessment rather than anatomical grading alone. A significant lip or tongue tie with no feeding symptoms in a thriving baby is generally not an indication for procedure.

Parents should be appropriately cautious about providers who recommend laser frenectomy based solely on anatomy at a brief visit without a thorough feeding assessment, involvement of a lactation consultant, or a trial of conservative management first. At the same time, a significant tongue tie causing real feeding problems that a good lactation consultant cannot resolve with positioning and latch adjustments is a reasonable indication for referral for assessment and potential release.

When Should You See a Dentist About a Lip Tie or Tongue Tie?

See a dentist about a lip or tongue tie if feeding problems persist after working with a lactation consultant, if a speech therapist has identified restricted tongue mobility in a school-age child, or if a gap between the upper front teeth is present and persisting past the expected closing age.

See a dentist about a lip tie or tongue tie if you have already worked with a lactation consultant and feeding problems persist, if a speech therapist has noted restricted tongue mobility affecting articulation in a school-age child, or if a gap between the upper front teeth is present and persisting past the age when it would be expected to close on its own. A dentist can assess the anatomy, discuss whether treatment is appropriate, and coordinate with other members of the care team if needed.

For infants and newborns, the right starting point is usually a lactation consultant or your pediatrician rather than going directly to a procedure. For older children or adults where speech or dental concerns are the driver, a dentist or orthodontist is the more appropriate first point of contact. Willow Family Dentistry provides assessments for children across all ages and works with families to make decisions that are grounded in what is actually causing a problem rather than what is merely visible.

Further Reading

Lip ties and tongue ties are part of a broader picture of infant and pediatric oral health. The articles below cover related topics for parents navigating early childhood dental care.

• When Should a Child First See the Dentist?
• Cavities in Baby Teeth: Why They Matter
• When Do Baby Teeth Fall Out? The Full Timeline

Results may vary. Please consult with Dr. Jeong for personalized treatment recommendations.