What Are Birthmarks?
What Causes Birthmarks?
Types of Birthmarks
-
Pigmented birthmarks – caused by extra pigment cells
-
Vascular birthmarks – caused by changes in blood vessel
Pigmented Birthmarks
(Caused by extra skin pigment)
Pigmented birthmarks develop when melanocytes—the cells responsible for skin color—cluster together in a particular area. These marks usually appear brown, tan, gray, or bluish and may be present at birth or appear during early infancy.
Café-au-lait Spots
Café-au-lait spots are light brown, flat patches that resemble the color of coffee mixed with milk. They may be present at birth or appear during the first few years of life.
Most children who have one or two spots experience no health issues. However, if a baby develops multiple café-au-lait spots, especially larger ones, a pediatrician may recommend monitoring. In rare cases, numerous spots can be associated with certain genetic conditions, so regular observation ensures early evaluation if needed.
Blue-Grey Spots
(Commonly known as Mongolian spots)
Blue-grey spots appear as flat bluish or gray patches, most often on the lower back or buttocks. Because of their color, they are sometimes mistaken for bruises.
These marks are particularly common in babies with darker skin tones, including those of Asian, African, or Hispanic backgrounds. They are completely harmless and typically fade gradually during early childhood, often disappearing before school age.
Congenital Moles
(Congenital melanocytic nevi)
Congenital moles are moles present at birth. They may appear flat or slightly raised and can range in color from light brown to dark brown or black.
Most congenital moles are benign and require no treatment. However, larger moles may need periodic monitoring by a healthcare provider, as their size and appearance can change as a child grows. In rare cases, very large congenital moles carry a slightly higher risk of developing skin complications later in life, which is why doctors sometimes recommend routine check-ups.
Vascular Birthmarks
(Caused by blood vessels under the skin)
Vascular birthmarks occur when blood vessels develop differently during fetal development, creating visible marks on the skin. Because they involve blood vessels, these birthmarks typically appear red, pink, or purple.
They can be flat or raised and may change in size or color as a baby grows.
Infantile Hemangiomas
(Often called "strawberry birthmarks")
Infantile hemangiomas are bright red or pink raised marks that form from clusters of blood vessels under the skin.
These birthmarks may not be very noticeable at birth but often appear during the first few weeks of life. They typically grow during the first few months before gradually shrinking over time. Most hemangiomas fade significantly by early childhood without requiring treatment.
Medical evaluation may be recommended if the hemangioma grows rapidly, interferes with vision or breathing, or becomes irritated.
Salmon Patches
(Also called stork bites or angel kisses)
Salmon patches are soft pink or reddish marks that often appear on a baby's eyelids, forehead, nose, or the back of the neck.
They are extremely common and are caused by small blood vessels that are visible through the skin. These marks are harmless and usually fade naturally within the first few years of life. Marks on the back of the neck may sometimes persist but are typically hidden by hair as the child grows.
Port-Wine Stains
Port-wine stains are flat pink, red, or purple marks that result from enlarged blood vessels in the skin. They are often found on the face, neck, or scalp.
Unlike many other birthmarks, port-wine stains usually do not fade on their own and may become darker or thicker over time. Because of this, doctors often recommend medical evaluation. In some cases, treatments such as laser therapy may help lighten the appearance of the mark.
Frequently Asked Questions
Many birthmarks gradually fade as children grow.
Common examples that often disappear include:
- Salmon patches
- Dermal melanocytosis
- Some hemangiomas
These usually fade during early childhood or before school age.
However, certain birthmarks — such as port wine stains or some moles — may remain permanently.
There is no universal answer. The decision usually depends on several factors.
1. Medical evaluation comes first
A pediatrician or dermatologist should evaluate the birthmark to determine:
- the type of birthmark
- potential health risks
- whether it may fade naturally
2. Waiting is often recommended
For many birthmarks, doctors suggest watchful waiting, especially if the mark may fade naturally.
Observation until age 2–5 is common before considering treatments such as laser therapy.
3. Consider all factors carefully
Parents should weigh several considerations:
- health risks
- size and location of the birthmark
- likelihood of natural fading
- treatment risks or side effects
- potential psychological impact later in life
A balanced approach helps families choose what feels right for their child.
4. Parents shape a child's self-image
Children often learn how to feel about their appearance from their parents.
Helpful approaches include:
- treating the birthmark as a normal part of the body
- avoiding negative attention toward it
- helping children understand their uniqueness
- supporting their choices as they grow older
Confidence often begins with how a child's family talks about their differences.
