Harlequin Color Change in Newborns
Medically reviewed by Dr. Michael Okonkwo, MD, FAAP · Board-Certified Neonatologist
Content reviewed against published AAP, NIH guidelines
Last reviewed:
If your baby has been diagnosed with or you suspect harlequin color change in newborns, here is what the evidence says.
The short answer
Harlequin color change is a harmless phenomenon where one half of your newborn's body turns red or pink while the other half appears pale, often when lying on their side. It is caused by immature blood vessel regulation and typically resolves within minutes. It is most common in the first few days of life and has no medical significance.
Key takeaways
- Harlequin color change is a harmless phenomenon where one half of your newborn's body turns red or pink while the other half appears pale, often when lying on their side. It is caused by immature blood vessel regulation and typically resolves within minutes. It is most common in the first few days of life and has no medical significance.
- Usually normal when: One half of the body turns red or pink while the other half appears pale, especially when baby is on their side
- Call your doctor if: Your baby appears unwell, lethargic, or has difficulty breathing along with skin color changes
- 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.”
Parents everywhere have the same worry. You are doing the right thing by looking into it.
What Parents Should Know
According to AAP, NIH guidelines, harlequin color change is a harmless phenomenon where one half of your newborn's body turns red or pink while the other half appears pale, often when lying on their side. It is caused by immature blood vessel regulation and typically resolves within minutes. It is most common in the first few days of life and has no medical significance. At 0-1 month, harlequin color change most commonly occurs in the first week of life and is seen in up to 10% of newborns. It typically happens when the baby is lying on one side - the dependent (lower) side becomes red while the upper side appears pale. The line of demarcation is usually sharp, running down the midline of the body. The color change resolves within seconds to minutes when the baby is repositioned. It is caused by immature autonomic regulation of blood vessels and is completely benign. It is generally considered normal when one half of the body turns red or pink while the other half appears pale, especially when baby is on their side. However, you should contact your pediatrician promptly if your baby appears unwell, lethargic, or has difficulty breathing along with skin color changes.
Normal vs. Concerning
By Age
What to expect by age
0-1 month
Harlequin color change most commonly occurs in the first week of life and is seen in up to 10% of newborns. It typically happens when the baby is lying on one side - the dependent (lower) side becomes red while the upper side appears pale. The line of demarcation is usually sharp, running down the midline of the body. The color change resolves within seconds to minutes when the baby is repositioned. It is caused by immature autonomic regulation of blood vessels and is completely benign.
1-3 months
Harlequin color change becomes increasingly rare after the first few weeks as your baby's vascular system matures. If you still see occasional episodes, they remain harmless and will resolve on their own. The phenomenon has no association with heart, lung, or neurological problems.
3-6 months
By this age, harlequin color change should no longer occur. Your baby's autonomic nervous system and blood vessel tone have matured. Any new or persistent color changes at this age should be discussed with your pediatrician.
6-12 months
Harlequin color change does not occur at this age. If you notice unusual color changes in your baby's skin, consult your pediatrician to rule out other causes.
What to Tell Your Pediatrician
- Describe when you first noticed harlequin color change in newborns and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if the color change happens frequently or lasts longer than a few minutes.
- Mention if you are unsure whether what you are seeing is harlequin color change or something else.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- One half of the body turns red or pink while the other half appears pale, especially when baby is on their side
- The color change resolves within seconds to minutes when baby is moved
- Baby is otherwise well, feeding normally, and breathing comfortably
- The phenomenon occurs in the first few weeks of life
- The color change happens frequently or lasts longer than a few minutes
- You are unsure whether what you are seeing is harlequin color change or something else
- The color change persists beyond the first month of life
- Your baby appears unwell, lethargic, or has difficulty breathing along with skin color changes
- Blue or purple discoloration of the lips, tongue, or entire body that does not resolve with repositioning
What You Can Do at Home
- Keep track of when you notice harlequin color change in newborns — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that one half of the body turns red or pink while the other half appears pale, especially when baby is on their side — this is generally within the range of normal.
- At 0-1 month, 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 appears unwell, lethargic, or has difficulty breathing along with skin color changes.
Related Conditions
Mottled or Marbled Skin in Newborns (Cutis Marmorata)
Mottled or marbled-looking skin (cutis marmorata) is very common in newborns and young babies. It appears as a lacy, bluish-red pattern on the skin and typically occurs when your baby is cold or during temperature changes. It is almost always a normal, harmless finding that resolves as your baby grows.
Blue Hands and Feet in Newborns (Acrocyanosis)
Blue or purple hands and feet in a newborn (acrocyanosis) is very common and almost always normal in the first few days of life. It happens because your baby's circulation is still maturing and blood flow to the extremities is adjusting to life outside the womb.
Related Resources
Frequently asked questions
Is harlequin color change in newborns normal?
When should I call the doctor about harlequin color change in newborns?
When is harlequin color change in newborns normal?
What causes harlequin color change in newborns?
What should I mention to my pediatrician about harlequin color change in newborns?
Is harlequin color change in newborns normal at 0-1 month?
Is harlequin color change in newborns normal at 1-3 months?
Should I go to the ER for harlequin color change in newborns?
Does harlequin color change in newborns go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Harlequin Color Change in Newborns.
Things to mention
- Describe when you first noticed harlequin color change in newborns and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if the color change happens frequently or lasts longer than a few minutes.
- Mention if you are unsure whether what you are seeing is harlequin color change or something else.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- The color change happens frequently or lasts longer than a few minutes
- You are unsure whether what you are seeing is harlequin color change or something else
- The color change persists beyond the first month of life
Urgent signs to report immediately
- Your baby appears unwell, lethargic, or has difficulty breathing along with skin color changes
- Blue or purple discoloration of the lips, tongue, or entire body that does not resolve with repositioning
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 harlequin color change in newborns are normal. Talk to your pediatrician if your baby appears unwell, lethargic, or has difficulty breathing along with skin color changes.
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
Mottled or Marbled Skin in Newborns (Cutis Marmorata)
Mottled or marbled-looking skin (cutis marmorata) is very common in newborns and young babies. It appears as a lacy, bluish-red pattern on the skin and typically occurs when your baby is cold or during temperature changes. It is almost always a normal, harmless finding that resolves as your baby grows.
Blue Hands and Feet in Newborns (Acrocyanosis)
Blue or purple hands and feet in a newborn (acrocyanosis) is very common and almost always normal in the first few days of life. It happens because your baby's circulation is still maturing and blood flow to the extremities is adjusting to life outside the womb.
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.