Nevus Maternus

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 12 min read
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Nevus Maternus
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Nevus Maternus, also known as "congenital melanocytic nevus" or "birthmark," is a type of pigmented skin lesion that is present at birth or develops in the first few weeks of life. It is a benign growth of melanocytes, which are the cells responsible for producing...

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বাংলা রোগী নোট এখনো যোগ করা হয়নি। পোস্ট এডিটরে “RX Bangla Patient Mode” বক্স থেকে সহজ বাংলা সারাংশ যোগ করুন।

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Article Summary

Nevus Maternus, also known as "congenital melanocytic nevus" or "birthmark," is a type of pigmented skin lesion that is present at birth or develops in the first few weeks of life. It is a benign growth of melanocytes, which are the cells responsible for producing the pigment melanin in the skin. Nevus maternus is a relatively common condition and affects approximately 1 in 100 newborns....

Key Takeaways

  • This article explains Causes in simple medical language.
  • This article explains Symptoms in simple medical language.
  • This article explains Diagnosis in simple medical language.
  • This article explains Treatment in simple medical language.
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Definition

Nevus Maternus, also known as “congenital melanocytic nevus” or “birthmark,” is a type of pigmented skin ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।" data-rx-term="lesion" data-rx-definition="A lesion is an abnormal area of tissue such as a spot, wound, patch, lump, or ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।">lesion that is present at birth or develops in the first few weeks of life. It is a benign growth of melanocytes, which are the cells responsible for producing the pigment melanin in the skin. Nevus maternus is a relatively common condition and affects approximately 1 in 100 newborns.

There are different types of nevus maternus, which can be classified based on their size, depth, and number of melanocytes. Some of the most common types of nevus maternus include:

  1. Simple Nevus Maternus: This is the most common type of nevus maternus and is usually small, less than 2 centimeters in diameter, and has a well-defined border. It is typically flat or slightly raised and is usually brown or black in color.
  2. Compound Nevus Maternus: This type of nevus maternus is larger than a simple nevus maternus and has a more irregular border. It may be raised or elevated above the surface of the skin and can be tan, brown, or black in color.
  3. Giant Nevus Maternus: This type of nevus maternus is larger than 20 centimeters in diameter and is usually dark brown or black in color. It can be raised or elevated above the surface of the skin and may have a rough texture.
  4. Dysplastic Nevus Maternus: This type of nevus maternus is typically larger than a simple nevus maternus and has an irregular border. It may have an irregular color, with different shades of brown or black, and may be raised or elevated above the surface of the skin.
  5. Nevus Spilus: This type of nevus maternus is also known as a “speckled lentiginous nevus.” It is a large, flat, brown or black ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।" data-rx-term="lesion" data-rx-definition="A lesion is an abnormal area of tissue such as a spot, wound, patch, lump, or ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।">lesion that is usually present at birth.
  6. Nevus of Ota: This type of nevus maternus is a type of congenital melanocytic nevus that affects the skin and the tissues beneath the skin in the eye and head regions. It is usually blue or gray in color and is most commonly found on the face, particularly around the eye and cheek.

It is important to note that not all nevus maternus are the same and that the type of nevus maternus can affect the way it is managed. In some cases, simple nevus maternus may not require any treatment, while more complex types, such as giant nevus maternus or dysplastic nevus maternus, may require surgical removal for cosmetic or medical reasons.

Causes

However, there are a few potential factors that may increase the risk of developing a nevus maternus, such as genetic predisposition, exposure to certain chemicals or radiation, hormonal changes during pregnancy, and certain medical conditions.

Here are some of the most commonly cited causes and risk factors for nevus maternus:

  1. Genetics: One of the most significant factors that can increase the risk of developing a nevus maternus is genetics. If a person has a family history of the condition, they are more likely to develop a nevus maternus themselves.
  2. Exposure to UV radiation: Excessive exposure to UV radiation from the sun or tanning beds can increase the risk of developing a nevus maternus, as UV radiation can damage the DNA in skin cells and cause an overgrowth of pigment cells.
  3. Chemical exposure: Exposure to certain chemicals, such as pesticides and chemicals used in the manufacture of certain products, can increase the risk of developing a nevus maternus.
  4. Hormonal changes during pregnancy: Hormonal changes during pregnancy can increase the risk of developing a nevus maternus, as increased levels of hormones such as estrogen and progesterone can stimulate the growth of pigment cells.
  5. Certain medical conditions: Certain medical conditions, such as neurofibromatosis and tuberous sclerosis, can increase the risk of developing a nevus maternus.
  6. Age: The risk of developing a nevus maternus increases with age, as the skin becomes less able to repair itself and is more susceptible to damage from UV radiation and other factors.
  7. Immune system dysfunction: A weakened immune system can increase the risk of developing a nevus maternus, as the body is less able to fight off abnormal cell growth.
  8. Exposure to ionizing radiation: Exposure to ionizing radiation, such as that used in medical procedures or from radiation therapy for cancer, can increase the risk of developing a nevus maternus.
  9. Certain medications: Certain medications, such as phenytoin and chloroquine, can increase the risk of developing a nevus maternus.
  10. Infections: Certain infections, such as human papillomavirus (HPV) and human immunodeficiency virus (HIV), can increase the risk of developing a nevus maternus.
  11. Alcohol consumption: Alcohol consumption can increase the risk of developing a nevus maternus, as alcohol can damage the DNA in skin cells and cause an overgrowth of pigment cells.
  12. Tobacco use: Tobacco use can increase the risk of developing a nevus maternus, as the chemicals in tobacco smoke can damage the DNA in skin cells and cause an overgrowth of pigment cells.
  13. Poor nutrition: Poor nutrition can increase the risk of developing a nevus maternus, as the body needs certain nutrients, such as vitamins A, C, and E, to maintain healthy skin.
  14. Lack of physical activity: Lack of physical activity can increase the risk of developing a nevus maternus, as physical activity helps to improve circulation and support healthy skin.
  15. Stress: Stress can increase the risk of developing a nevus maternus, as stress can weaken the immune system and increase the production of hormones that can stimulate the growth of pigment

Symptoms

While nevus maternus is generally considered a harmless skin ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।" data-rx-term="lesion" data-rx-definition="A lesion is an abnormal area of tissue such as a spot, wound, patch, lump, or ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।">lesion, it is important to be aware of the various symptoms that may be associated with it. Here is a list of possible symptoms of nevus maternus:

  1. A dark, pigmented, raised or flat ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।" data-rx-term="lesion" data-rx-definition="A lesion is an abnormal area of tissue such as a spot, wound, patch, lump, or ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।">lesion on the scalp, face, neck, or other parts of the body.
  2. The presence of hair growing from the birthmark.
  3. An itchy or painful sensation in or around the birthmark.
  4. Swelling or redness in the area of the birthmark.
  5. A change in the size or shape of the birthmark.
  6. The development of crusting or scabbing on the birthmark.
  7. A discharge or secretion from the birthmark.
  8. The formation of blisters or ulcerations on the birthmark.
  9. A change in color or texture of the birthmark.
  10. A sensation of tightness or burning in the area of the birthmark.
  11. A decrease in the amount of hair growing from the birthmark.
  12. The development of a raised or elevated area on the birthmark.
  13. The formation of a cyst or blister within the birthmark.
  14. The development of a rash or hives in the area of the birthmark.
  15. A loss of pigmentation in the area of the birthmark.
  16. The formation of a scar on the birthmark.
  17. The development of a keloid, a type of raised scar.
  18. A change in the direction of hair growth from the birthmark.
  19. The development of a crusty or scaly appearance on the birthmark.
  20. The formation of a callus, a thickened area of skin, on the birthmark.

It is important to note that not all individuals with nevus maternus will experience all of these symptoms. Some people may only have one or two symptoms, while others may experience many of these symptoms. Additionally, the symptoms can vary in severity and duration.

Diagnosis

Diagnosis of Nevus Maternus can be made through various tests and examinations, which include:

  1. Physical Examination: The first step in diagnosing Nevus Maternus is a physical examination of the affected area by a dermatologist. During this examination, the dermatologist will look for any signs of asymmetry, irregular borders, or changes in color.
  2. Dermatoscopy: This is a non-invasive diagnostic tool that uses a handheld device with a magnifying lens and a light source to examine the skin. It can help the dermatologist to identify the characteristic features of Nevus Maternus, such as the presence of pigment and blood vessels.
  3. Biopsy: A biopsy involves removing a small sample of skin for examination under a microscope. This can help to confirm the diagnosis of Nevus Maternus and rule out other conditions, such as skin cancer.
  4. Dermoscopy-guided biopsy: This is a combination of dermatoscopy and biopsy, where the dermatologist uses the dermatoscope to guide the biopsy and ensure that the sample is taken from the most representative area of the ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।" data-rx-term="lesion" data-rx-definition="A lesion is an abnormal area of tissue such as a spot, wound, patch, lump, or ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।">lesion.
  5. Reflectance Confocal Microscopy (RCM): This is a non-invasive diagnostic tool that uses a laser beam to produce high-resolution images of the skin. It can help to provide detailed information about the structure of the ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।" data-rx-term="lesion" data-rx-definition="A lesion is an abnormal area of tissue such as a spot, wound, patch, lump, or ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।">lesion and can aid in the diagnosis of Nevus Maternus.
  6. Ultrasound: This is a diagnostic tool that uses high-frequency sound waves to produce images of the skin and underlying tissues. It can help to determine the depth and extent of the Nevus Maternus and can aid in the planning of treatment.
  7. Magnetic Resonance Imaging (MRI): This is a diagnostic tool that uses a strong magnetic field and radio waves to produce images of the body. It can help to determine the extent of the Nevus Maternus and to identify any associated abnormalities.
  8. Computed Tomography (CT) Scan: This is a diagnostic tool that uses X-rays and computer technology to produce detailed images of the body. It can help to determine the extent of the Nevus Maternus and to identify any associated abnormalities.
  9. Positron Emission Tomography (PET) Scan: This is a diagnostic tool that uses a small amount of radioactive material and a special camera to produce images of the body. It can help to determine the extent of the Nevus Maternus and to identify any associated abnormalities.
  10. Electron Microscopy: This is a diagnostic tool that uses a high-powered electron microscope to examine skin samples at a very high magnification. It can help to provide detailed information about the structure of the ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।" data-rx-term="lesion" data-rx-definition="A lesion is an abnormal area of tissue such as a spot, wound, patch, lump, or ulcer. সহজ বাংলা: শরীরের অস্বাভাবিক দাগ, ক্ষত বা ফোলা অংশ।">lesion and can aid in the diagnosis of Nevus Maternus.
  11. Genetic Testing: This involves analyzing a sample of the patient’s blood or tissue to determine if there is a genetic mutation that is associated with Nevus Maternus. This test can help to identify the underlying cause of the condition and can aid in the planning of treatment.
  12. Immunohistochemistry: This is a diagnosis. সহজ বাংলা: রক্ত/প্রস্রাব/নমুনা পরীক্ষা।" data-rx-term="laboratory test" data-rx-definition="A laboratory test examines blood, urine, tissue, or other samples to help diagnosis. সহজ বাংলা: রক্ত/প্রস্রাব/নমুনা পরীক্ষা।">laboratory test that uses antibodies to detect specific proteins in tissue samples. It can help to determine the type of cells present in the Nevus Maternus and can aid in the diagnosis

Treatment

Treatments for nevus maternus:

  1. Observation: In some cases, no treatment is necessary and the birthmark may fade on its own over time.
  2. Topical lightening agents: These agents, such as hydroquinone, can help to lighten the appearance of pigmented birthmarks.
  3. Microdermabrasion: This procedure involves using a device to gently remove the outer layer of skin, which can help to lighten the appearance of pigmented birthmarks.
  4. Chemical peels: Chemical peels use a solution to remove the outer layer of skin and promote the growth of new, unblemished skin.
  5. Cryotherapy: Cryotherapy involves the use of liquid nitrogen to freeze the birthmark, causing it to peel off and eventually disappear.
  6. Laser therapy: Lasers can be used to remove or lighten pigmented birthmarks by destroying the pigmented cells.
  7. Intense pulsed light (IPL) therapy: IPL uses high-intensity light to target and remove pigmented cells.
  8. Surgical excision: In some cases, surgical excision may be necessary to remove a birthmark that is causing physical discomfort or cosmetic concerns.
  9. Tattooing: Tattooing can be used to cover up a birthmark, particularly if it is located in a visible area.
  10. Makeup: Concealer or other types of makeup can be used to cover up a birthmark.
  11. Camouflage tattoos: Similar to traditional tattoos, camouflage tattoos are used to cover up a birthmark, but they are specifically designed to match the surrounding skin tone.
  12. Dermabrasion: Dermabrasion involves using a rotating instrument to remove the outer layer of skin, which can help to improve the appearance of a birthmark.
  13. Corticosteroid injections: Corticosteroids can be injected into the birthmark to help reduce its size and improve its appearance.
  14. Topical corticosteroids: Topical corticosteroids can be applied to the birthmark to help reduce its size and improve its appearance.
  15. Radiation therapy: Radiation therapy may be used to shrink or remove a birthmark, particularly if it is located in a sensitive area.
  16. Interferon injections: Interferon is a naturally occurring protein that can be injected into the birthmark to help reduce its size and improve its appearance.
  17. Topical interferon: Topical interferon can be applied to the birthmark to help reduce its size and improve its appearance.
  18. Photodynamic therapy: Photodynamic therapy uses a special light to activate a topical medication that is applied to the birthmark, causing it to shrink or disappear.
  19. Electrodessication and curettage: Electrodessication and curettage involves using a special instrument to remove the birthmark by scraping it off and cauterizing the area.
  20. Sclerotherapy: Sclerotherapy involves injecting a special solution into the birthmark to cause it to shrink and eventually disappear.

It is important to note that not all treatments are appropriate or effective for all types of nevus maternus. The best course of treatment will depend on the individual case and should be discussed with a dermatologist or other medical

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What to tell the doctor

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Doctor to discuss: Doctor / qualified healthcare provider
Tests to discuss with doctor
  • Basic vital signs: temperature, pulse, blood pressure, oxygen level if needed
  • Relevant blood, urine, imaging, or specialist tests only after clinical assessment
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Safe pathway to proper treatment

Care roadmap for: Nevus Maternus

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

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Frequently Asked Questions

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Seek urgent care for severe symptoms, rapidly worsening condition, breathing difficulty, severe pain, neurological changes, or any emergency warning sign.

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Acral Nevus

Acral nevus, also known as a melanocytic nevus or a mole, is a common skin growth…

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Acrosyringeal Nevus

Acrosyringeal nevus, also known as the nevus of Weedon and Lewis, is a rare skin condition…

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  8. Congenital Lipomatous Overgrowth-Vascular Malformation-Epidermal Nevi-Spinal Anomaly Syndrome

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