Blue Lips (Cyanosis) in Babies
Content reviewed against published AAP, AAP, NIH guidelines
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Blue discoloration of the lips, mouth, or face (central cyanosis) in a baby indicates low oxygen levels in the blood and is always a medical emergency requiring immediate evaluation. It is critical to distinguish central cyanosis (blue lips, tongue, and mucous membranes) from acrocyanosis (blue hands and feet only), which is very common and normal in newborns, especially when cold. Central cyanosis can indicate serious heart or lung problems and must never be ignored.
Key takeaways
- Blue discoloration of the lips, mouth, or face (central cyanosis) in a baby indicates low oxygen levels in the blood and is always a medical emergency requiring immediate evaluation.
- Most common cause: Acrocyanosis — blue hands and feet only (normal in newborns, not true cyanosis)
- Emergency: Blue lips or tongue at rest — call 911 immediately
- Home care: Central cyanosis (blue lips/tongue) is a medical emergency — call 911 immediately
Possible Causes
When to Seek Help
Emergency — Call 911 or go to ER:
- Blue lips or tongue at rest — call 911 immediately
- Blue face or body with difficulty breathing
- Blue color that does not resolve within 1-2 minutes
- Blue color with lethargy, limpness, or unresponsiveness
- Blue color with signs of choking or airway obstruction
- Newborn with persistent central cyanosis after birth
- Blue color with grunting, retractions, or fast breathing
Urgent — See doctor today:
- Episode of blue lips that resolved but has never been evaluated
- Recurrent blue episodes even if brief and self-resolving
- Blue color during feeds in an infant (possible cardiac cause)
- Toddler with blue lips during physical activity
Same-day appointment:
- First breath-holding spell with cyanosis — needs diagnosis confirmation
- Parent reports possible brief blue episode but child appears well now
Monitor at home:
- Blue hands and feet only (acrocyanosis) in a well newborn — normal
- Known breath-holding spells (previously diagnosed) with typical pattern
- Brief perioral blue tinge only during intense crying that resolves within seconds
By Age
0-2 months
Normal: Blue hands and feet (acrocyanosis) are normal for the first 24-48 hours of life and can recur with cold exposure. Brief perioral blue tinge during vigorous crying that resolves immediately is common.
Worry if: Blue tongue or inside of lips at any time (central cyanosis). Persistent blue color that does not resolve with warming or when baby stops crying. Blue color during feeding. Blue color with fast breathing, grunting, or lethargy.
2-6 months
Normal: Mild blue discoloration around mouth during vigorous crying that resolves within seconds is generally not concerning.
Worry if: Any episode where lips or tongue appear blue. Blue color with feeding difficulty or sweating during feeds. Blue color during sleep. Persistent or worsening blue episodes.
6-12 months
Normal: Breath-holding spells may begin, where child turns blue during intense crying but recovers spontaneously within 30-60 seconds.
Worry if: Blue lips not associated with crying or breath-holding. Blue color with respiratory illness or distress. Blue episodes with limpness or loss of consciousness beyond typical breath-holding. Blue color with new onset of exercise intolerance.
1-3 years
Normal: Breath-holding spells peak at 1-2 years. Brief circumoral blue tinge in cold weather that resolves indoors is normal.
Worry if: Blue lips with activity or exercise. Blue episodes lasting more than a minute. Blue color with squatting (classic sign of tetralogy of Fallot). Blue with chest pain or difficulty breathing.
Home Care
- Central cyanosis (blue lips/tongue) is a medical emergency — call 911 immediately
- While waiting for help: keep baby calm and in a comfortable position
- Do NOT restrict baby's breathing with tight swaddling if baby appears blue
- For acrocyanosis (blue hands/feet only): warm the baby with skin-to-skin or a blanket
- Learn infant CPR — essential for all parents
- For known breath-holding spells: lay child on their side, stay calm, time the episode
- Do NOT blow in face, splash water, or shake baby during a breath-holding spell
- After an episode of blue lips: even if baby recovers, seek medical evaluation for first-time events
- Do NOT assume it was "just a breath-holding spell" without prior medical diagnosis
Frequently asked questions
What causes blue lips (cyanosis)?
When is this an emergency?
What can I do at home?
When should I call the doctor?
Sources
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources
Related Symptoms
Bottom line
Most cases of blue lips (cyanosis) in babies are not emergencies. However, seek immediate care if blue lips or tongue at rest — call 911 immediately.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.