Mongolian Blue Spots in Babies – Causes, Symptoms & Treatment

7 min read

Written by Aparna Hari

Aparna Hari

Mongolian Blue Spots Baby

Mongolian blue spots in babies are a type of birthmark that you can commonly see in newborns, especially those with darker skin tones. They commonly appear at birth or occur shortly after. The reason for birthmarks varies from individual to individual. Slate grey nevi cannot be prevented from developing, and researchers are baffled as to why some infants develop them while others do not.

The marks emerge as a result of some melanocytes, the skin’s pigment cells, becoming “trapped” in the skin’s deeper layers throughout an infant’s growth. The absence of pigment causes a grey, greenish, blue, or black mark to emerge on the surface. These birthmarks provide no health risk because they are not malignant. To be sure of the diagnosis, your pediatrician should check the marks. Yet you don’t need to panic. Here is the detailed article on the Mongolian blue spot, the reasons for it, and when to consult the doctor.

In This Article

What Are Mongolian Blue Spots in Babies?

Mongolian blue spots, also known as congenital dermal melanocytosis, are a type of birthmark that commonly appear in newborn babies, particularly those with darker skin tones. They are characterized by flat, bluish-grey patches of skin, usually found on the lower back or buttocks, although they can also occur in other areas of the body. Here are some important points to know about Mongolian blue spots:

1. Appearance

Mongolian blue spots typically present as irregularly shaped, flat patches of bluish-grey or bluish-black discoloration on the skin. The size and shape of the spots can vary, but they are generally harmless and painless. The texture of the skin doesn’t change.

2. Prevalence

Mongolian blue spots are more common in individuals with darker skin tones, such as those of East Asian, Native American, African, or Hispanic descent. They are less common in individuals with lighter skin.

3. Cause

These birthmarks occur due to the presence of a higher concentration of melanocytes, which are pigmented cells responsible for skin color, in the deeper layers of the skin. The exact cause of this concentration is not fully understood. But it is believed to be related to the development of the baby’s skin during pregnancy.

4. Natural Fading

Mongolian blue spots are generally harmless and fade naturally over time. In most cases, they gradually lighten and become less visible as the child grows older. By the age of 5 or 6 years, the spots tend to fade significantly or disappear completely.
No treatment necessary

5. No Treatment Needed

Mongolian blue spots are generally benign and do not require medical treatment. They do not pose any health risks or complications and are purely cosmetic concerns. However, if there are any concerns about the spots or any changes in their appearance, it is advisable to consult a healthcare professional for proper evaluation.

While Mongolian blue spots are typically harmless, you can always seek medical advice from a healthcare professional, such as a pediatrician or dermatologist if you have any specific concerns about your baby’s health or any skin condition.

Causes of Mongolian Blue Spots In Babies

Mongolian Blue Spots Causes

The exact cause of Mongolian blue spots is not fully understood. However, several factors contribute to the development of these birthmarks in babies.

1. Melanocyte Distribution

Mongolian blue spots occur due to an increased concentration of melanocytes. In individuals with Mongolian blue spots, these melanocytes are more densely distributed in the deeper layers of the skin.

2. Genetic Factors

There is evidence to suggest that genetic factors may play a role in the development of Mongolian blue spots. They are more common in individuals with darker skin tones, such as those of East Asian, Native American, African, or Hispanic descent. It is thought that certain genetic variations may contribute to the increased concentration of melanocytes in the skin.

3. Development During Pregnancy

Mongolian blue spots are present at birth and develop during the fetal stage. The concentration of melanocytes in the skin is thought to be influenced by various factors during pregnancy, including the production and migration of melanocytes in the developing skin layers.

It’s important to note that Mongolian blue spots are not caused by any external factors or injuries. They are not related to trauma or abuse and should not be mistaken for bruises or other skin conditions. Mongolian blue spots are generally harmless and fade naturally over time without any medical intervention.

Symptoms Of Mongolian Blue Spots

Mongolian blue spots are distinctive in their distinctive appearance on the skin. Here are the main symptoms and signs of Mongolian blue spots in babies.

a. Skin Discoloration

The primary symptom of Mongolian blue spots is the presence of bluish-grey or bluish-black patches on the skin. These patches are typically flat and have irregular shapes. They can vary in size, ranging from a few centimeters to several inches in diameter.

b. Location

Mongolian blue spots most commonly occur on the lower back or buttocks. However, they can also appear on other areas of the body, such as the shoulders, limbs, or even the face. The specific location may vary from one individual to another.

c. Lack of Elevation

Mongolian blue spots are usually flat and do not protrude above the skin surface. They have a smooth texture and are not raised or bumpy.

d. Absence of Symptoms

Mongolian blue spots are generally painless and do not cause any discomfort or itching. They are typically asymptomatic and do not cause any other signs or symptoms.

It’s important to note that Mongolian blue spots are benign and do not cause any health problems. They are more of cosmetic concerns rather than medical issues. These spots fade and become less visible over time, often disappearing completely by the age of 5 or 6 years.

How Are Mongolian Blue Spots Detected?

There are no specific tests to detect or diagnose Mongolian blue spots. The nature and characteristics of the spots help doctors identify them. These include

  • Presence of bluish-grey patches on the skin at the base of the spine, lower back, and buttocks.
  • Presence of these birthmarks at birth or appearance shortly after.
  • Occurrence in babies with darker skin tones, particularly those belonging to East Asian, Native American, Hispanic, or African descent. 
  • No other accompanying symptoms or medical complications.

But recent studies show that the Mongolian spots can associate with the alteration of metabolism and can lead to metabolic diseases like Hurler’s disease 

Treatment Options For Mongolian Blue Spots

Mongolian Spots Treatment

Mongolian blue spots, being a benign condition, typically do not require any specific treatment. In most cases, these spots gradually fade and disappear on their own as the child grows older. However, for cosmetic reasons or if the spots persist into later childhood or adulthood, there are some treatment options to consider.

1. Monitoring

The primary approach is often to observe the Mongolian blue spots without intervention, as they tend to naturally fade over time. Most spots become significantly lighter or disappear completely by the age of 5 or 6 years.

2. Topical Treatments

Your pediatrician or dermatologist may suggest certain creams or ointments to lighten the appearance of the spots. These treatments typically contain ingredients such as hydroquinone, retinoids, or corticosteroids. However, the effectiveness of topical treatments may vary, and it’s essential to consult a healthcare professional before using any such products, especially for babies.

3. Laser Therapy

In some cases, your doctor may recommend laser therapy to lighten or remove Mongolian blue spots. Laser treatments work by targeting and breaking down the pigment in the skin, allowing the body to gradually eliminate it. Multiple sessions may be required for optimal results, and it’s important to consult with a qualified dermatologist or laser specialist for proper assessment and treatment.

It’s important to remember that the decision to pursue treatment for Mongolian blue spots is typically based on personal preference or concerns about the appearance of the spots.

When to See a Doctor?

Consulting Doctor For Mongolian Spots

In most cases, Mongolian blue spots do not require medical intervention and fade naturally over time. However, you can consult a healthcare professional, such as a pediatrician or dermatologist, if you observe any of the following situations:

a. Uncertainty

If you are unsure whether the marks on your baby’s skin are Mongolian blue spots or if you have concerns about their appearance, it’s best to seek a medical evaluation to confirm the diagnosis and provide appropriate guidance.

b. Unusual Changes in Appearance

Most mongolian blue spots fade over time. But do remember to consult your doctor in case of any unusual changes in the appearance of the spots. This includes rapid growth, irregular borders, changes in color or texture, or any other concerning features.

c. Associated Symptoms or Discomfort

Mongolian blue spots are generally asymptomatic and do not cause any discomfort or other symptoms. If your baby experiences any unusual symptoms associated with the spots, such as itching, pain, or inflammation, it’s important to have a medical evaluation to determine the cause and provide appropriate care.

d. Concerns or Anxiety

If you have any concerns or anxiety about your baby’s skin condition, it’s always advisable to seek professional advice. A healthcare professional can address your concerns, provide reassurance, and offer appropriate guidance.

Always believe in your mother’s instinct. If you feel your baby is uncomfortable with the Mongolian blue spot, take the baby to the hospital.

Mongolian blue spots in babies are benign and, in most cases, do not cause any harm to your baby. They fade away and disappear with time, except in very rare cases. If you find this spot appearing on your baby, do consult a doctor and get their advice. However, just remember that this condition will not cause any problems to your baby except in rare conditions.


1. Do Baby Mongolian Spots go Away?

Yes, Mongolian spots or Mongolian blue spots are harmless and usually fade away on their own as the baby grows. This condition doesn’t have any treatment either unless you want to get the marks to be treated for cosmetic reasons. In rare cases, the marks may stay or get darker.

2. What Age do Mongolian Spots Appear?

Mongolian spots or Mongolian blue spots in babies can appear either at birth or around 1 to 2 weeks after birth. These are basically birth marks that slowly fade away in most cases as the baby grows.

3. Can Mongolian Marks Spread?

No, Mongolian spots do not generally spread. If you find that the spots are spreading, then the condition may need immediate medical attention. If you notice a change in the depth of color and size of the Mongolian marks, it is always better to consult a doctor.

3. Is a Mongolian Spot a Birthmark?

Yes, the Mongolian spot is a birthmark. It usually appears in babies at birth or within 1 to 2 weeks after birth. In most cases, the Mongolian spot will fade away as the baby grows. In a few rare cases, you will see that the birth mark will stay put or get darker in color as the baby grows,


Aparna Hari,MBA in Marketing,P.G. Diploma in Human Resource Management from IGNOU Bachelor of Sciences (Home Science) from Nagarjuna University

Her experience in impactful writing combined with her background in Home Sciences makes Aparna the perfect candidate for content writing in the pregnancy and parenting niche.Read more.

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