Birthmarks are colored spots on the skin that babies are born with or develop shortly after birth. These marks can be bright red, pink, brown, tan, or bluish. Birthmarks can be flat on the surface of the skin or raised.
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The exact cause of birthmarks is unknown. However, some birthmarks can be genetic or associated with a disease.
Moles are common in all humans. Other birthmarks may be isolated or have different causes. For example: Café-au-lait spots—may occur in people with neurofibromatosisHemangiomas—more common in females, those with light skin, and babies born prematurelyMongolian spots—common in people with darker skinPort-wine stains—may occur in people with Sturge-Weber or Klippel Trenaunay syndrome
Symptoms differ depending on the type of birthmark. Symptoms may include: Café-au-lait spots—light tan colored spots on the bodyHemangiomas—flat or slightly raised birthmarks that are bright red or bluish in color; often found on the face, head, and neckMacular stain—pinkish or light red birthmarks that are sometimes referred to as "angel's kisses" or "stork bites"; common on the back of the head and neck and above the eyesMoles—dark brown or black spotsMongolian spots—flat birthmarks on the surface of the skin that have a blue-gray color; often located on the buttocks or the base of the spinePort-wine stains—pink, red, or purple colored blotches on the skin; often found on the face, neck, arms, or legsCongenital nevus—a dark, textured mole that may be covered in hair; often found on the abdomen and thighs
On rare occasions, moles can become cancerous. Any suspicious, colored lesion should be examined by a physician and closely observed or removed.
You will be asked about your symptoms and medical history. A physical exam will be done. Birthmarks are usually diagnosed based on the appearance of the skin area. If there is any question of the diagnosis, a biopsy may be taken and tested. You may also be referred to a dermatologist, a doctor who specializes in skin disorders.
Most birthmarks can and should be left alone. Treatment is generally recommended if the birthmark is: Cosmetically undesirable and unlikely to resolve on its ownCausing discomfort or complicationsHas the potential to develop into a more serious condition (rare)
Treatment options depend on the type of birthmark and may include the following: Medications, such as beta blockers and corticosteroids for hemangiomasLaser therapy—to prevent the growth of hemangiomas and to remove hemangiomas and port-wine stainsSurgery—to remove a colored lesion or to remove scars that remain from other treatmentsCosmetic alternatives—There are many makeup products that effectively cover up birthmarks. These are sometimes referred to as corrective cosmetics.
Regular check-ups with your doctor or dermatologist are important for lesions undergoing treatment or observation.
Birthmarks cannot be prevented.
Birthmarks. Kids Health—Nemours Foundation website. Available at:
http://kidshealth.org/parent/general/body/birthmarks.html. Updated April 2013. Accessed May 5, 2016.
Guttman C. Clinical, molecular features aid worrisome birthmark recognition.
Dermatology Times. 2005;26(4):66-67.
Hemangioma information. Vascular Birthmark Foundation website. Available at:
http://www.birthmark.org/node/24. Accessed May 5, 2016.
Why people get birthmarks. American Academy of Dermatology website. Available at:
http://www.aad.org/dermatology-a-to-z/for-kids/about-skin/birthmarks/why-people-get-birthmarks. Accessed May 5, 2016.
Last reviewed August 2016 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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