Should I Be Worried About My Baby's Birthmark?
The short answer
Most birthmarks are harmless and do not require treatment. Common types include salmon patches (stork bites), Mongolian spots, and cafe au lait spots, which are all benign. Some birthmarks like port wine stains or large hemangiomas may need monitoring or treatment. Your pediatrician can evaluate any birthmark during routine well-child visits and determine whether further assessment is needed.
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By Age
What to expect by age
0-3 months
Many birthmarks are visible at birth or appear within the first few weeks. Salmon patches (pink flat marks on the eyelids, forehead, or back of neck) are extremely common and usually fade within the first year or two. Mongolian spots (blue-gray flat areas on the back or buttocks, most common in babies with darker skin tones) are completely benign and typically fade by school age. Congenital moles present at birth should be documented by your pediatrician for monitoring over time.
3-12 months
Some birthmarks, particularly infantile hemangiomas (strawberry marks), may appear in the first few weeks and grow rapidly during the first 3-6 months before slowly shrinking. Most hemangiomas resolve on their own by age 5-10. However, hemangiomas near the eyes, nose, mouth, or diaper area, or very large hemangiomas, may need early treatment with propranolol or other interventions. Cafe au lait spots (light brown flat marks) are common; having one or two is normal, but six or more may warrant genetic evaluation.
12-36 months
By the toddler years, most birthmarks have declared their pattern - either fading, stable, or (in the case of some hemangiomas) beginning to involute. Continue to monitor any birthmark for significant changes in size, color, shape, texture, or if it begins to bleed or ulcerate. Port wine stains (flat, pink-to-dark red marks) do not fade on their own and can be treated with pulsed dye laser therapy if desired. Regular dermatology follow-up is recommended for large congenital moles or unusual-appearing marks.
What Should You Do?
When to take action
- Your baby has a salmon patch (stork bite) on the eyelids, forehead, or back of the neck - these are the most common birthmarks and are harmless.
- Your baby has a Mongolian spot - a flat blue-gray area, typically on the lower back or buttocks.
- Your baby has a small hemangioma that your pediatrician has evaluated and is monitoring over time.
- Your baby has one or two cafe au lait spots that are flat and evenly colored.
- A birthmark is growing quickly, changing shape, or changing color.
- Your baby has a birthmark near the eye, nose, lip, or genital area that could interfere with function.
- Your baby has six or more cafe au lait spots, which can be associated with neurofibromatosis.
- A hemangioma appears to be ulcerating, bleeding, or causing your baby pain.
- A birthmark is actively bleeding and you cannot stop the bleeding with gentle pressure.
- A birthmark near the airway (nose, throat) appears to be affecting your baby's breathing or feeding.
- A large facial hemangioma is growing rapidly near the eye and could obstruct vision - early treatment is important to prevent amblyopia.
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Skin Concerns
My Baby Has a Strawberry Hemangioma
A strawberry hemangioma is a bright red, raised birthmark made of extra blood vessels. It typically appears in the first few weeks of life, grows for several months, and then slowly shrinks and fades over several years. Most hemangiomas are harmless and do not require treatment, though your pediatrician will monitor growth and location.
My Baby's Hemangioma Is Getting Bigger
Infantile hemangiomas are the most common benign tumors in babies, appearing in about 5-10% of infants. They typically grow rapidly during the first 3-5 months, then gradually plateau and shrink over years. Most hemangiomas resolve on their own without treatment, but those near the eyes, nose, mouth, or airway may need early intervention.
Baby Hives (Urticaria)
Hives are raised, red, itchy welts that can appear suddenly on your baby's skin. They are most often caused by a viral infection or an allergic reaction to food, medication, or an insect bite. While they can look alarming, hives are usually harmless and resolve on their own, though any breathing difficulty needs immediate emergency care.
My Baby Has an Extra Nipple (Accessory Nipple)
Accessory (supernumerary) nipples are one of the most common minor congenital findings, occurring in about 1 in 18 people. They appear as small, flat, often pigmented bumps along the "milk line" — an embryonic line running from the armpit to the groin on each side. Most people mistake them for moles. Accessory nipples are almost always harmless and require no treatment. In rare cases, they may be associated with kidney abnormalities, so some pediatricians recommend a renal ultrasound if one is found, though this practice varies.
My Baby Was Born with a Raw Spot on Their Scalp (Aplasia Cutis)
Aplasia cutis congenita (ACC) is a condition where a baby is born with a small area of missing skin, most commonly on the scalp. It occurs in about 1 in 10,000 births. The affected area may look like a raw wound, an ulcer, or may have already healed into a thin, shiny scar by the time of birth. Most cases are small, isolated, and heal well with basic wound care — the area eventually forms a hairless scar. Larger defects or those associated with other findings may need more investigation, but isolated small ACC has an excellent prognosis.
New Treatments for Atopic Dermatitis (Eczema) in Children
Treatment for atopic dermatitis in children has advanced significantly in recent years. While moisturizers and topical steroids remain first-line treatments, newer options include non-steroidal topical medications (like crisaborole), biologic therapies (like dupilumab, approved for children 6 months and older), and JAK inhibitors. Most children's eczema is well-managed with basic skin care and mild topical treatments, but these newer options provide hope for moderate-to-severe cases.