Birthmarks in Children: Types, Causes, Treatment, and When to Seek Medical Advice
Birthmarks are common skin marks that may be present at birth or become noticeable during the first weeks or months of a child’s life. They can vary considerably in color, size, shape, and texture. Some are flat, while others may be raised, and they can appear almost anywhere on the body.
Most birthmarks are harmless and do not require treatment. Most birthmarks are harmless and do not require treatment. The American Academy of Dermatology provides additional information about common birthmarks, their appearance, and when they may require medical evaluation.
Although birthmarks are usually nothing to worry about, certain types may require medical follow-up, particularly when they are large, grow rapidly, bleed, become painful, or are located near important areas such as the eyes, nose, or airway.
What Causes Birthmarks?
There is no single cause of birthmarks.
Some develop because of an abnormal collection or growth of blood vessels, while others are related to an increased number of pigment-producing cells in the skin.
In most cases, birthmarks are not caused by anything the mother did or did not do during pregnancy. Some types may have a genetic or familial association, but most occur without a clear identifiable cause.
Types of Birthmarks
Birthmarks are generally divided into two broad groups:
1. Vascular Birthmarks
These are caused by differences or abnormalities in blood vessels in the skin. They may appear red, pink, purple, or bluish depending on the type and depth of the blood vessels involved.
Common examples include:
- Infantile hemangiomas
- Port-wine stains
- Salmon patches
2. Pigmented Birthmarks
These occur because of an increased concentration or distribution of pigment-producing cells in the skin.
Examples include:
- Café-au-lait spots
- Congenital melanocytic nevi
- Mongolian spots, also known as congenital dermal melanocytosis
Common Vascular Birthmarks
1. Salmon Patches
Salmon patches are very common flat pink or reddish marks that are usually present at birth.
They are commonly found on:
- The forehead
- Eyelids
- Nose
- Upper lip
- Back of the head or neck
They may become more noticeable when a baby cries, becomes warm, or strains.
Many salmon patches on the face fade significantly during early childhood. Those located on the back of the neck may persist for longer and are sometimes called a “stork bite.”
Most salmon patches are harmless and do not require treatment.
2. Infantile Hemangiomas
Infantile hemangiomas are benign growths made up of blood vessels. Unlike many birthmarks, they may not be clearly visible at birth and can become noticeable during the first few weeks of life.
They often appear as:
- Bright red raised marks on the skin
- Soft, bluish or purplish areas when they are deeper under the skin
- A combination of superficial and deeper components
Infantile hemangiomas often grow rapidly during the first few months of life. Their growth pattern and natural course can vary, so early assessment can help determine whether monitoring or treatment is appropriate.
Many eventually disappear or become much less noticeable without treatment.
However, not every hemangioma should simply be left untreated. Some require medical assessment, particularly when they:
- Are very large
- Grow rapidly
- Are located near the eye
- Affect the nose, mouth, or airway
- Interfere with feeding or breathing
- Ulcerate or bleed
- Are associated with other concerning findings
When treatment is necessary, doctors may use medications such as propranolol, which is recommended as a first-line systemic treatment for infantile hemangiomas that require medical therapy. Laser therapy and surgery may also be considered in selected cases.
3. Port-Wine Stains
Port-wine stains are flat vascular birthmarks that usually appear pink, red, or purple.
They are most commonly found on the face or neck, although they can occur anywhere on the body.
Unlike many infantile hemangiomas, port-wine stains generally do not disappear on their own. Unlike some other vascular birthmarks, port-wine stains usually persist throughout life and may become darker or thicker over time. Laser treatment may help lighten their appearance.
Port-wine stains involving certain areas of the face, particularly around the eye or forehead, may require further evaluation because, in some children, they can be associated with underlying conditions.
A doctor may recommend additional examinations or imaging when appropriate.
Pulsed-dye laser therapy is commonly used to lighten port-wine stains. Multiple treatment sessions may be required, and the degree of improvement varies from person to person.
Common Pigmented Birthmarks
1. Café-au-Lait Spots
Café-au-lait spots are flat, light-brown patches of skin. Their name comes from their characteristic color, which resembles coffee mixed with milk.
One or two café-au-lait spots are relatively common and are often harmless.
However, having multiple café-au-lait spots, particularly six or more, may sometimes be associated with certain genetic conditions, including neurofibromatosis type 1 (NF1).
The presence of these spots alone does not mean that a child has NF1. A doctor will consider the child’s overall clinical findings and medical history before making a diagnosis.
2. Mongolian Spots
Mongolian spots, more accurately known as congenital dermal melanocytosis, are flat blue-gray or slate-colored marks.
They are commonly found on:
- The lower back
- Buttocks
- Hips
They are more common in children with darker skin tones.
These marks are benign and usually become lighter as the child grows. In many children, they fade considerably during childhood.
Because their appearance can sometimes resemble a bruise, it is useful for parents and healthcare professionals to recognize them as birthmarks.
3. Moles and Congenital Melanocytic Nevi
Moles, medically known as nevi, are common skin growths caused by clusters of pigment-producing cells.
They can be:
- Flat or raised
- Brown, black, or skin-colored
- Small or large
- Present at birth or develop later in childhood
Moles are common and are usually harmless.
However, large congenital melanocytic nevi may carry a higher lifetime risk of melanoma compared with smaller moles. Children with large or unusual congenital nevi should therefore receive appropriate medical assessment and follow-up.
Parents should also seek medical advice if a mole changes significantly in:
- Size
- Shape
- Color
- Border
- Surface
or if it begins to bleed, crust, or become persistently painful.
When Does a Birthmark Need Medical Evaluation?
Most birthmarks are harmless, but it is important to have a child examined if a mark:
- Grows very quickly
- Changes significantly in color or appearance
- Bleeds without an obvious injury
- Develops an open sore or ulcer
- Becomes painful
- Appears infected
- Is located near the eye
- Interferes with vision
- Is close to the mouth or nose and affects feeding or breathing
- Is unusually large
- Is associated with several other unusual skin findings
A pediatrician or dermatologist can determine what type of birthmark is present and whether further evaluation is necessary.
How Are Birthmarks Diagnosed?
A dermatologist can often identify the type of birthmark through a clinical examination and determine whether further testing or treatment is necessary.
Depending on the type of lesion, the doctor may use dermoscopy, a specialized examination that provides a closer view of the skin.
Some vascular birthmarks may require additional assessment, such as an ultrasound or other imaging studies, particularly when they are large, deep, rapidly growing, or located near important structures.
A biopsy is not usually necessary for typical birthmarks but may occasionally be recommended when the diagnosis is uncertain.
Treatment of Birthmarks
Most birthmarks do not require treatment.
Treatment is generally considered when a birthmark:
- Affects a child’s health or normal function
- Causes repeated bleeding or ulceration
- Interferes with vision, breathing, feeding, or movement
- Has a significant risk of complications
- Causes substantial cosmetic or emotional concerns
Treatment depends entirely on the type of birthmark.
Treatment options may include:
Observation:
Many birthmarks simply need regular monitoring as the child grows.
Medication:
Certain infantile hemangiomas may be treated with medications such as propranolol when they are considered high-risk or likely to cause complications.
Laser therapy:
Laser treatment can be used for selected vascular birthmarks, particularly port-wine stains.
Surgical treatment:
Surgery may be considered for selected large or problematic lesions, including some congenital melanocytic nevi.
The decision to treat should always be made after a medical evaluation rather than based solely on the appearance of the birthmark.
What Should Parents Do If a Birthmark Bleeds?
If a birthmark becomes injured and starts bleeding, apply gentle, continuous pressure with clean gauze or a clean cloth until the bleeding stops.
Once the bleeding has stopped, keep the area clean and monitor it for signs of infection.
Seek medical attention if:
- The bleeding does not stop with pressure.
- The wound is deep.
- There are signs of infection.
- The lesion repeatedly bleeds without an obvious injury.
Parents should avoid attempting to remove, cut, burn, or treat a birthmark at home.
Should Parents Be Worried About Birthmarks?
In most cases, no.
Birthmarks are extremely common, and the majority are harmless. Having a birthmark does not mean that a child has a serious medical condition.
However, it is important to remember that different birthmarks behave differently. Some fade naturally, some remain unchanged, and others may grow as the child grows.
Regular medical assessment is especially important for birthmarks that are large, rapidly changing, located near the eyes or airway, or associated with other symptoms.
Helping Children Feel Comfortable About Their Birthmarks
As children grow older, they may become more aware of differences in their appearance and may receive questions or comments from other children.
Parents can help by speaking positively and openly about the birthmark and reassuring the child that having a birthmark is a normal variation in appearance.
If the birthmark causes significant emotional distress or affects the child’s confidence, discussing the available medical and cosmetic options with a pediatrician or dermatologist can be helpful.
Frequently Asked Questions
Do birthmarks disappear on their own?
Some do. Certain vascular birthmarks, such as many infantile hemangiomas and salmon patches, may become lighter or disappear over time. Other birthmarks, such as port-wine stains, usually persist.
Are birthmarks hereditary?
Some types may have a genetic or familial association, but most birthmarks occur without a clear inherited cause.
Can birthmarks turn into cancer?
Most birthmarks do not become cancerous. However, certain large congenital melanocytic nevi have a higher risk of melanoma and should be appropriately evaluated and monitored.
Should a child with a birthmark see a dermatologist?
Not every child needs specialist care. However, medical evaluation is recommended when the birthmark is large, rapidly changing, unusual in appearance, bleeding, painful, or located near an important structure such as the eye or airway.
Can birthmarks be removed?
Some birthmarks can be lightened or removed using medical treatments such as laser therapy, medication, or surgery. However, treatment is not always necessary and depends on the type, location, size, and potential risks of the birthmark.
Conclusion
Birthmarks are common in children and can vary widely in appearance. Most are harmless and require nothing more than observation as the child grows.
Understanding the difference between vascular and pigmented birthmarks can help parents recognize which marks are likely to disappear naturally and which ones may need medical follow-up.
If a birthmark grows rapidly, changes in appearance, bleeds, becomes painful, or is located near the eye, airway, or another sensitive area, it is important to have the child evaluated by a pediatrician or dermatologist.
Medical Disclaimer: This article is intended for general health education and does not replace a medical examination, diagnosis, or individualized medical advice. If you have concerns about a child’s birthmark, consult a qualified healthcare professional.
See : Dermatology