A lip tie can affect breastfeeding, dental health, the transition to solid foods, and in some cases breathing patterns during sleep. The term refers to a tight or thick band of tissue (called a frenulum) connecting the upper lip to the gum above the front teeth. Everyone has this tissue, but when it’s unusually short or thick, it can restrict the upper lip’s range of motion and create a chain of problems from infancy into adulthood.
Breastfeeding and Latch
The most common reason parents first hear about lip ties is difficulty with breastfeeding. For a baby to latch deeply onto the breast, the upper lip needs to flange outward and form a complete seal. When a lip tie holds the upper lip tight against the gum, the baby may struggle to maintain that seal, leading to clicking sounds during feeding, frequent slipping off the breast, or a shallow latch that makes nursing painful for the parent and inefficient for the baby.
That said, the clinical picture is less clear-cut than many online sources suggest. La Leche League Canada notes there is no standardized definition of what counts as a “normal” versus “tight” upper lip frenulum, and no research has shown that clipping a lip tie improves breastfeeding outcomes. The practical guideline is straightforward: if the upper lip can form a complete seal without clicking or slipping off the breast, the tie is not causing a feeding problem, regardless of how it looks. Many babies with visible lip ties breastfeed without any difficulty at all.
Dental Health and Tooth Gaps
A significant lip tie can create a visible gap between the two upper front teeth, known as a diastema. The thick band of tissue physically occupies the space between the teeth and can prevent them from coming together naturally as they grow in. This gap is common in toddlers and young children and sometimes closes on its own as the permanent teeth erupt, but a persistent lip tie can keep the space open.
Beyond appearance, lip ties can raise the risk of tooth decay in young children. Normally, the upper lip sweeps food particles and milk residue away from the front teeth during feeding and movement. When the lip is tethered tightly against the gum, food and liquid can get trapped along the gumline where it’s difficult to clean, creating a breeding ground for the bacteria that cause cavities. Parents of children with lip ties often notice buildup on the upper front teeth despite regular brushing.
In adults who were never treated, the long-term dental effects can include cavities concentrated on the front teeth, overcrowding, and the persistent gap between the upper incisors.
Transitioning to Solid Foods
Lip ties don’t just affect nursing. When babies start solid foods around six months, restricted upper lip movement can make it harder to clear food off a spoon, manage different textures, and move food around the mouth for chewing. Common signs during this stage include excessive drooling, pocketing food in the cheeks instead of swallowing it, gagging more than expected, and general frustration at mealtimes. Some children develop strong preferences for soft or pureed foods well past the age when they should be handling more complex textures, simply because managing those textures is physically harder for them.
Speech and Articulation
A lip tie on its own is less likely to cause speech problems than a tongue tie, but the two often occur together. When they do, the combined restriction can interfere with sounds that require significant tongue elevation or precise lip movement. The phonemes most commonly affected include /t/, /d/, /n/, /l/, /r/, /s/, and /th/. Children may present with unclear speech, a lisp, mumbling, or frustration when trying to communicate. Some show delayed language development not because of a cognitive issue but because the physical mechanics of forming certain sounds are harder for them.
It’s worth noting that most of the clinical research on speech effects focuses on tongue ties rather than lip ties specifically. A lip tie in isolation is unlikely to cause major articulation problems, but if your child has both, the speech impact can be more noticeable.
Breathing and Sleep
A less obvious but potentially significant effect of a lip tie is its influence on breathing patterns. When the upper lip is tethered, it can encourage an open-mouth resting posture, which in turn promotes habitual mouth breathing. Over time, mouth breathing in children can contribute to changes in how the jaw and face develop, potentially narrowing the airway.
Restricted oral tissues may also mean the muscles of the mouth don’t develop as strongly as they should. Weaker oral muscles increase the chance of the airway partially collapsing during sleep, which can contribute to snoring or obstructive sleep apnea. In children, signs of sleep-disordered breathing include restless sleep, snoring, frequent waking, and daytime fatigue or irritability. These connections are more established for tongue ties than lip ties alone, but the two conditions frequently overlap and compound each other’s effects.
What Treatment Looks Like
The standard treatment for a problematic lip tie is a frenectomy, a quick procedure that releases the tight band of tissue. In infants and young children, this is typically done with a laser or sterile scissors and takes only a few minutes. Older children and adults may receive local anesthesia. The procedure itself is straightforward, but the aftercare matters just as much.
After a release, the wound naturally wants to heal back together, which can undo the benefit of the procedure. To prevent this, stretching exercises are typically performed three to five times a day for several weeks. Each stretch lasts about 10 to 15 seconds: you gently lift the upper lip to keep the healing tissue from reattaching. For children old enough to cooperate, additional exercises may focus on proper tongue posture, nasal breathing, and correct swallowing patterns, all of which help maintain the results and support better airway function long term.
Not every lip tie needs treatment. Many children with a visible lip tie have no feeding issues, normal speech development, and healthy teeth. The decision to intervene depends on whether the tie is actually causing functional problems, not simply on how it looks.