Lip tie is an increasingly recognized condition where the labial frenum—the tissue connecting the upper lip to the gums—is unusually short or thick, potentially restricting lip movement and affecting feeding efficiency. While research on lip ties continues to evolve, evidence suggests that significant lip ties can contribute to breastfeeding difficulties and may warrant intervention in some cases.
Understanding Lip Tie Anatomy
The labial frenum is a naturally occurring fold of tissue connecting the lip to the gum. In most people, this tissue is thin and positioned appropriately, allowing normal lip movement and seal. In lip tie, the frenum extends further down toward the gum line than typical, or is thicker and less flexible than normal.
Lip ties are classified similarly to tongue ties based on their extent. Some infants have only mild lip ties that appear prominent but cause no functional impairment. Others have significant ties that restrict the upper lip's ability to flange outward (flip out) during feeding, which can affect proper latch and feeding mechanics.
Breastfeeding Impact
During proper breastfeeding, the infant's upper lip should flange outward to create a seal around the breast tissue. The lip seal, combined with tongue movement, creates the suction necessary for milk extraction. When a significant lip tie restricts this outward lip movement, the infant may struggle to maintain proper latch.
Mothers of infants with restrictive lip ties often report similar problems as those with infants with tongue ties: painful nursing, nipple damage, and audible clicking during feeding. The infant may have difficulty achieving adequate milk transfer, resulting in prolonged feeding times and inadequate weight gain.
However, not all lip ties cause feeding difficulties. Some infants with anatomically obvious lip ties breastfeed efficiently without problems. This is why functional assessment is important—the visible appearance of a lip tie may not correlate with actual feeding impairment.
Lip Tie and Bottle Feeding
Bottle feeding is sometimes easier for infants with lip ties compared to breastfeeding. The softer, more flexible bottle nipple may allow adequate feeding even when lip movement is restricted. However, some infants with significant lip ties struggle with bottle feeding as well.
Parents may notice their infant has difficulty maintaining latch on bottle nipples, takes unusually long to feed, or appears frustrated with feeding efforts. These signs suggest the lip tie may be contributing to feeding difficulties.
Evaluating Lip Tie Significance
Before recommending treatment, practitioners should assess whether the lip tie is actually causing functional impairment. A thorough breastfeeding evaluation by a lactation consultant familiar with lip ties can help determine whether the lip tie is contributing to feeding difficulties or if other factors are involved.
Infants with feeding problems should be evaluated to rule out tongue tie, oral motor dysfunction, maternal factors, and other causes before attributing difficulties to a lip tie alone. In many cases, addressing other issues, such as tongue tie or improving feeding technique, may resolve difficulties without needing to address a lip tie.
Treatment Considerations
Frenotomy (surgical division of the lip tissue) can be performed for significant lip ties affecting feeding. The procedure is similar to tongue tie release—the restrictive tissue is divided, allowing the lip to move more freely.
However, the indication for lip tie frenotomy is less clear-cut than for tongue tie. Professional organizations have not established definitive guidelines for when lip tie treatment is indicated. Some practitioners recommend treatment for symptomatic infants with clear feeding difficulties, while others believe evidence doesn't support routine treatment.
Research and Evidence
Scientific evidence regarding the clinical significance of lip ties remains limited compared to tongue tie research. Some studies suggest that lip ties can affect feeding, while others find no significant correlation between lip tie presence and feeding difficulties.
The International Lactation Consultant Association acknowledges that lip ties may contribute to feeding difficulties in some cases, but emphasizes that identification should be based on functional impairment, not anatomy alone. More research is needed to clarify when lip tie treatment is truly indicated.
When to Seek Evaluation
If your infant is experiencing feeding difficulties—maternal nipple pain, inadequate infant weight gain, prolonged feeding times, or audible clicking during feeding—seek evaluation from a lactation consultant or pediatric dentist familiar with both tongue and lip ties.
A thorough evaluation should assess all factors contributing to feeding difficulties. Sometimes addressing tongue tie alone resolves difficulties. In other cases, improving breastfeeding technique or positioning may resolve concerns without surgical intervention.
Post-Treatment Outcomes
If frenotomy is performed for a significant lip tie affecting feeding, many mothers report improvement in comfort and feeding efficiency within days. The infant may achieve better latch and more efficient milk transfer, though some infants may require time to adapt to improved lip mechanics.
As with tongue tie frenotomy, some practitioners recommend post-procedure exercises to maintain the surgical release, though evidence for these exercises is limited.
Making Treatment Decisions
Decisions about lip tie treatment should be individualized based on the degree of anatomical restriction, evidence of functional impairment, and failed attempts at other interventions. A qualified practitioner should fully explain why treatment is recommended and the expected outcomes.
If you're uncertain whether your infant's lip tie warrants treatment, seeking a second opinion from another experienced practitioner is reasonable. The goal is ensuring your infant feeds efficiently while supporting successful breastfeeding and healthy development.
Lip tie is a condition that continues to generate discussion and research among pediatric dental and lactation professionals. While its clinical significance remains somewhat debated, infants with clear feeding difficulties secondary to restrictive lip ties may benefit from frenotomy. The key is ensuring thorough functional assessment before treatment is recommended.