Baby's Lip Quivering
The short answer
Lip quivering in newborns is very common and usually completely normal. It is caused by the immature nervous system and typically occurs when baby is cold, hungry, tired, or crying. This should resolve on its own within the first few months as the nervous system matures.
This is one of the most common questions parents ask. Searching for answers means you care.
By Age
What to expect by age
Lip quivering or trembling is extremely common in newborns and is almost always normal. The newborn nervous system is still immature, and the pathways that control fine muscle movements are not fully developed. You may notice the lower lip quivering when baby is exposed to cooler temperatures, during or after crying, when hungry, or during diaper changes. These brief episodes of lip trembling are a normal part of the nervous system maturing and are not seizures. Seizures in newborns look different: they involve rhythmic, sustained movements that cannot be stopped by gently holding the limb, and may include eye deviation, apnea, or changes in consciousness.
Lip quivering gradually decreases as the nervous system matures. It may still occur with temperature changes, tiredness, or crying. If the quivering is becoming more frequent, more intense, or occurring at unexpected times (not triggered by cold, crying, or hunger), mention it to your pediatrician.
Most lip quivering has resolved by this age. Occasional trembling with crying or cold is still normal. Persistent or new-onset trembling at this age should be evaluated.
Lip quivering from nervous system immaturity should be resolved. Any new trembling or quivering at this age should be discussed with your pediatrician.
What Should You Do?
When to take action
- Brief lip quivering when baby is cold, crying, or hungry
- Quivering that stops on its own within seconds
- Baby is otherwise alert, feeding well, and developing normally
- Episodes decrease over the first few months
- Lip quivering that seems to be getting more frequent rather than less
- Quivering that occurs when baby is calm and warm with no obvious trigger
- Quivering persists beyond 3 months of age
- Sustained rhythmic movements of the face, lips, or tongue that cannot be interrupted
- Lip quivering accompanied by eye rolling, stiffening, or changes in breathing or consciousness, which may indicate seizure
- Baby is unresponsive or difficult to arouse during or after episodes
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Medical Concerns
Baby's Chin Trembling
Chin trembling in newborns is very common and typically normal. It results from the immature nervous system and usually occurs when baby is cold, hungry, startled, or crying. These brief, self-resolving tremors diminish as the nervous system matures over the first 2-3 months.
Baby's Tongue Color Changes (Blue or White)
A white coating on baby's tongue after feeding is usually just milk residue, though a persistent white coating that does not wipe off may be oral thrush. A blue tongue in a baby is more concerning and may indicate oxygen issues that need immediate medical evaluation.
My Baby's Head Shape Looks Abnormal
Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.
Achondroplasia (Dwarfism) in Babies
Achondroplasia is the most common form of short-limbed dwarfism, affecting about 1 in 15,000 to 40,000 births. It is caused by a mutation in the FGFR3 gene and is usually apparent at birth with characteristic features including short limbs, a larger head, and a prominent forehead. Intelligence is normal. With monitoring for specific complications and supportive care, children with achondroplasia lead full, active, and independent lives.
Adenoid Hypertrophy and Breathing
Adenoids are lymphoid tissue located behind the nose that help fight infection in young children. When adenoids become enlarged (adenoid hypertrophy), they can block the nasal airway, causing chronic mouth breathing, snoring, nasal speech, and sleep-disordered breathing. Enlarged adenoids are most common between ages 2-7 and are a leading cause of obstructive sleep apnea in young children. Treatment ranges from watchful waiting and nasal steroids to surgical removal (adenoidectomy) if breathing or sleep is significantly affected.
How to Advocate for Your Child's Needs
You know your child better than anyone, and your observations matter. If you feel something is not right with your child's development or health, you have every right to ask questions, request evaluations, and seek second opinions. Advocating for your child is not being difficult - it is being a good parent.