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Blue Skin in Newborns: What Is Normal and What Needs Attention

Authored by | Last medically reviewed: May 2026

In the first 24 to 48 hours of life, blue or purple hands and feet are common and usually normal - this is called acrocyanosis. The key area to check is the tongue and gums. If those remain pink, the baby is generally getting enough oxygen. Blue color on the tongue or gums is different and needs prompt attention.
Left panel shows blue-gray skin around the mouth with pink lips and a pink tongue visible inside — illustrating perioral skin discoloration that is often benign. Right panel shows the same baby with blue-gray skin around the mouth but now with a blue tongue inside — illustrating central cyanosis that requires prompt medical attention. Labels direct parents to look inside the mouth at the tongue and gums.When you see blue skin around the mouth — look insideThe tongue and gums tell you more than the skin around the lipsBlue skin around mouth — tongue pinkBlue skin around mouth — tongue bluepinkBlue-grayskin onlyTongue andgums — pink ✓Often benignPerioral skin discolorationwith pink tongue and gumsblueBlue-grayskinTongue or gumsalso blue — seek careSeek medical attentionBlue tongue or gums meansoxygen levels need evaluationWhat to look forBlue or gray skin around the mouth alone — with a pink tongue and pink gums — is often a benign finding,especially in newborns. Gently open the mouth and look at the tongue and gums directly.If the tongue or gums are also blue — contact your child's doctor. Share this observation with your child's doctor.
In newborns, blue skin around the mouth is common. Open the mouth gently and check the tongue directly - pink tongue with blue skin around the mouth is different from blue tongue with blue skin around the mouth.

Symptom Log

Log what color changes you are observing and where - hands and feet only, or tongue and gums - so you can share this clearly with your child's doctor.

Why do some newborns have blue hands and feet after birth?

  • In the first 24 to 48 hours, many healthy newborns have bluish or purplish hands and feet - this is called acrocyanosis.
  • Acrocyanosis happens because blood circulation to the hands and feet is still maturing after birth.
  • Cold temperatures can make acrocyanosis more noticeable - warming the baby often improves the color.
  • The lips, tongue, and gums typically remain pink even when the hands and feet look blue.
  • Acrocyanosis is considered a normal newborn finding and usually resolves within the first few days of life.
  • Transient color changes, including a mottled bluish pattern on the trunk and limbs in response to cold, are also common in newborns.

What color changes in a newborn are different from normal acrocyanosis?

  • Blue or purple color on the tongue, gums, or inside the mouth - called central cyanosis - is different from blue hands and feet alone.
  • Central cyanosis suggests that oxygen levels throughout the body may be lower than expected.
  • In newborns, central cyanosis can be caused by heart conditions, lung problems, infections, or airway difficulties.
  • Some heart conditions present with cyanosis in the first hours or days of life as the circulation transitions from fetal to newborn patterns.
  • Respiratory causes - such as fluid in the lungs, infection, or immature lung tissue - may also produce blue color alongside fast breathing or grunting.
  • Central cyanosis that persists at rest or worsens is considered a significant finding in any newborn.

How is cyanosis checked before a newborn leaves the hospital?

  • All hospitals in the United States screen newborns for critical congenital heart disease using pulse oximetry - a painless sensor placed on the hand or foot.
  • This screening is typically performed around 24 hours after birth and measures oxygen levels in the blood.
  • Pulse oximetry can detect low oxygen levels that may not be visible to the eye, especially in babies with darker skin tones.
  • If the screening result is outside the expected range, further evaluation - including listening to the heart and possibly a heart ultrasound - may follow.
  • Some heart conditions may not show signs until days or weeks after birth, even after a normal screening result.
  • Prompt medical attention should be sought if blue color appears on the lips, tongue, or gums after discharge from the hospital.
Blue Color Around a Baby's Lips (Cyanosis)See the full visual guide to cyanosis in babies and young children - including what central cyanosis looks like and how pediatricians evaluate it.View visual guide →

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What do parents see when a newborn has acrocyanosis?

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References

  1. Oster ME, Pinto NM, Pramanik AK, et al. Newborn Screening for Critical Congenital Heart Disease: A New Algorithm and Other Updated Recommendations: Clinical Report. Pediatrics. 2025;155(1):e2024069667. doi:10.1542/peds.2024-069667
  2. Singh Y, Lakshminrusimha S. Perinatal Cardiovascular Physiology and Recognition of Critical Congenital Heart Defects. Clinics in Perinatology. 2021;48(3):573-594. doi:10.1016/j.clp.2021.05.008
Ebenezer Adebiyi, MD, MPH, FAAP

Ebenezer Adebiyi, MD, MPH, FAAP

Board-Certified Pediatrician · FAAP · Founder of PediaPulse

Dr. Adebiyi built PediaPulse to help parents understand what they are observing so they can have better, more informed conversations with their own doctors.