My Baby Turns Blue (Cyanosis)
Medically reviewed by Dr. Michael Okonkwo, MD, FAAP · Board-Certified Neonatologist
Content reviewed against published AAP, AAP, Mayo Clinic guidelines
Last reviewed:
If your baby has been diagnosed with or you suspect turns blue (cyanosis), here is what the evidence says.
The short answer
Blue or purple discoloration limited to a baby's hands and feet (acrocyanosis) is very common in newborns and usually harmless, caused by immature circulation. However, blue coloring of the lips, tongue, face, or trunk (central cyanosis) is always a medical emergency that requires immediate evaluation, as it may indicate a heart or lung problem.
Key takeaways
- Blue or purple discoloration limited to a baby's hands and feet (acrocyanosis) is very common in newborns and usually harmless, caused by immature circulation. However, blue coloring of the lips, tongue, face, or trunk (central cyanosis) is always a medical emergency that requires immediate evaluation, as it may indicate a heart or lung problem.
- Usually normal when: Blue or purple hands and feet (acrocyanosis) in a newborn in the first few days to weeks of life, while the lips and tongue remain pink
- Call your doctor if: Your baby's lips, tongue, gums, or trunk appear blue or gray at any age, especially at rest or during feeds, as this is a sign of central cyanosis and a medical emergency - call 911
- Varies by age — see the age-by-age breakdown below
“Fever itself is not an illness — rather, it is a sign or symptom that the body is fighting an infection. Fever stimulates certain defenses, such as the white blood cells, which attack and destroy invading bacteria.”
This is one of the most common questions parents ask. Searching for answers means you care.
What Parents Should Know
According to AAP, Mayo Clinic guidelines, blue or purple discoloration limited to a baby's hands and feet (acrocyanosis) is very common in newborns and usually harmless, caused by immature circulation. However, blue coloring of the lips, tongue, face, or trunk (central cyanosis) is always a medical emergency that requires immediate evaluation, as it may indicate a heart or lung problem. At 0-48 hours, acrocyanosis, or bluish-purple discoloration of the hands and feet, is extremely common in newborns and is a normal finding caused by immature peripheral circulation. It typically resolves within the first few days. Central cyanosis (blue lips, tongue, and trunk) in a newborn, however, is always abnormal and may indicate a congenital heart defect, respiratory distress, or other serious condition. Newborns are screened with pulse oximetry before hospital discharge to detect critical heart defects. It is generally considered normal when blue or purple hands and feet (acrocyanosis) in a newborn in the first few days to weeks of life, while the lips and tongue remain pink. However, you should contact your pediatrician promptly if your baby's lips, tongue, gums, or trunk appear blue or gray at any age, especially at rest or during feeds, as this is a sign of central cyanosis and a medical emergency - call 911.
Normal vs. Concerning
By Age
What to expect by age
0-48 hours
Acrocyanosis, or bluish-purple discoloration of the hands and feet, is extremely common in newborns and is a normal finding caused by immature peripheral circulation. It typically resolves within the first few days. Central cyanosis (blue lips, tongue, and trunk) in a newborn, however, is always abnormal and may indicate a congenital heart defect, respiratory distress, or other serious condition. Newborns are screened with pulse oximetry before hospital discharge to detect critical heart defects.
2 days - 3 months
Occasional mild acrocyanosis (blue hands and feet) can persist for weeks, especially when the baby is cold. This is generally benign. Perioral cyanosis, a faint blue tint around the mouth, is common during crying or cold exposure and is usually not concerning if the lips and tongue remain pink. However, any blue discoloration of the lips, tongue, or body, especially when the baby is at rest, warrants immediate medical attention to rule out heart or lung conditions.
3-12 months
By this age, acrocyanosis has typically resolved. Some babies develop breath-holding spells during intense crying, which can briefly cause blue or pale color changes. While alarming, brief breath-holding spells are usually benign and self-resolving. Any sustained cyanosis, cyanosis with poor feeding or difficulty breathing, or cyanosis at rest needs urgent evaluation. Some congenital heart defects may not become apparent until this age as the baby grows.
12 months+
Blue coloring in toddlers can occur during breath-holding spells (which peak around 18-24 months) or with respiratory infections such as croup or bronchiolitis. Breath-holding spells, while frightening, are generally harmless. However, any unexplained blue discoloration of the lips or skin at rest, or cyanosis with breathing difficulty, always needs emergency evaluation.
What to Tell Your Pediatrician
- Describe when you first noticed turns blue (cyanosis) and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you notice your baby's hands and feet remain persistently blue beyond the first few weeks of life.
- Mention if a faint bluish tint around the mouth seems to happen frequently, even when the baby is not cold or crying.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Blue or purple hands and feet (acrocyanosis) in a newborn in the first few days to weeks of life, while the lips and tongue remain pink
- A faint bluish tint around the mouth during crying or cold exposure that resolves quickly and the lips and tongue stay pink
- Brief color change during a breath-holding spell in an older infant or toddler that resolves spontaneously within seconds
- You notice your baby's hands and feet remain persistently blue beyond the first few weeks of life
- A faint bluish tint around the mouth seems to happen frequently, even when the baby is not cold or crying
- Your baby seems to tire easily during feeds or breathe faster than expected
- Your baby's lips, tongue, gums, or trunk appear blue or gray at any age, especially at rest or during feeds, as this is a sign of central cyanosis and a medical emergency - call 911
- Blue coloring is accompanied by rapid or labored breathing, grunting, flaring nostrils, chest retractions, limpness, or difficulty feeding, as these indicate severe respiratory or cardiac distress
What You Can Do at Home
- Keep track of when you notice turns blue (cyanosis) — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that blue or purple hands and feet (acrocyanosis) in a newborn in the first few days to weeks of life, while the lips and tongue remain pink — this is generally within the range of normal.
- At 0-48 hours, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Follow any care instructions from your pediatrician. Keep a written log of symptoms to bring to appointments.
- While monitoring at home, seek immediate care if your baby's lips, tongue, gums, or trunk appear blue or gray at any age, especially at rest or during feeds, as this is a sign of central cyanosis and a medical emergency - call 911.
Related Resources
Frequently asked questions
Is turns blue (cyanosis) normal?
When should I call the doctor about turns blue (cyanosis)?
When is turns blue (cyanosis) normal?
What causes turns blue (cyanosis)?
What should I mention to my pediatrician about turns blue (cyanosis)?
Is turns blue (cyanosis) normal at 0-48 hours?
Is turns blue (cyanosis) normal at 2 days - 3 months?
Should I go to the ER for turns blue (cyanosis)?
Does turns blue (cyanosis) go away on its own?
References
- [1]HealthyChildren.org. Cyanosis in Infants and Children. AAP
- [2]Mahle WT, et al. Role of Pulse Oximetry in Examining Newborns for Congenital Heart Disease. Pediatrics, 2009. AAP
- [3]Mayo Clinic. Cyanosis: Causes and When to Seek Help. Mayo Clinic
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss My Baby Turns Blue (Cyanosis).
Things to mention
- Describe when you first noticed turns blue (cyanosis) and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you notice your baby's hands and feet remain persistently blue beyond the first few weeks of life.
- Mention if a faint bluish tint around the mouth seems to happen frequently, even when the baby is not cold or crying.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- You notice your baby's hands and feet remain persistently blue beyond the first few weeks of life
- A faint bluish tint around the mouth seems to happen frequently, even when the baby is not cold or crying
- Your baby seems to tire easily during feeds or breathe faster than expected
Urgent signs to report immediately
- Your baby's lips, tongue, gums, or trunk appear blue or gray at any age, especially at rest or during feeds, as this is a sign of central cyanosis and a medical emergency - call 911
- Blue coloring is accompanied by rapid or labored breathing, grunting, flaring nostrils, chest retractions, limpness, or difficulty feeding, as these indicate severe respiratory or cardiac distress
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of turns blue (cyanosis) are normal. Talk to your pediatrician if your baby's lips, tongue, gums, or trunk appear blue or gray at any age, especially at rest or during feeds, as this is a sign of central cyanosis and a medical emergency - call 911.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
Was this page helpful?
Related Medical Concerns
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.
Adrenoleukodystrophy (ALD) in Babies
X-linked adrenoleukodystrophy (X-ALD) is a genetic disorder affecting about 1 in 17,000 newborns, caused by mutations in the ABCD1 gene on the X chromosome. It primarily affects boys and impairs the breakdown of very long-chain fatty acids (VLCFAs), which accumulate and damage the myelin sheath in the brain and the adrenal glands. The most severe form, cerebral ALD, typically affects boys between ages 4-10 with rapid neurological decline. Newborn screening now enables early detection, and hematopoietic stem cell transplant or gene therapy performed before significant brain involvement can be life-saving.
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.
Agenesis of the Corpus Callosum (ACC)
Agenesis of the corpus callosum (ACC) is a condition in which the corpus callosum — the bundle of nerve fibers connecting the left and right hemispheres of the brain — fails to develop partially or completely. It occurs in approximately 1 in 4,000 births and is one of the most common brain malformations. ACC can be detected on prenatal ultrasound or postnatal MRI. Outcomes vary enormously: some individuals with isolated ACC have normal intelligence and minimal difficulties, while others (especially when ACC occurs alongside other brain abnormalities or genetic syndromes) may have significant developmental delays. The variability means that prenatal counseling and postnatal monitoring are both essential.