Infantile Hemangioma

Infantile hemangiomas are a common type of birthmark, occurring in about 4 percent of infants. They are made up of collections of immature blood vessels that often grow rapidly, sometimes dramatically, during infancy. Hemangiomas vary in size, location and how large they grow. They may look like a bright red bump or area on the skin — called a "strawberry" birthmark — or like a blue or skin-colored mass if they grow deeper into the skin.

Hemangiomas usually appear in the first few weeks of life, then typically go through a period of rapid growth followed by a more gradual shrinking phase.

Hemangiomas are benign (not cancerous). In most cases, they don't cause health problems and can be left to shrink on their own. However, a significant minority of patients do need treatment. If needed, treatment should begin as quickly as possible. The UCSF Birthmarks and Vascular Anomalies Center and its physicians are internationally known for their expertise in managing infantile hemangiomas and related conditions.

The exact cause of hemangiomas is not known. They are more common among girls, babies with fair skin and premature babies. Some families may have a tendency toward the condition.

  • Show More

Infantile Hemangioma Phases

Most hemangiomas are either absent at birth or barely visible as a bruise-like area, an area of pale skin, or a flat pink or red spot. Most begin to appear in the first two to four weeks of life. They follow a predictable series of phases:

    Proliferative Phase: The hemangioma begins growing rapidly at a few weeks of age, often with a period of accelerated growth between four and eight weeks of life, but sometimes continuing for several months. Involution Phase: The growth stops and the hemangioma starts to involute (shrink). This process can take many years. Most hemangiomas have completed involution by 5 years of age.

In some cases, the involution leaves normal-looking skin or skin with only minor visible differences. In others, the skin may appear stretched or discolored. If this happens, the excess skin can be removed surgically or laser treatments can be used to improve the discoloration.

We recommend a reevaluation between 4 to 5 years of age if your child still has visible skin differences, to decide if any interventions are needed.

  • Show Less

Hemangiomas can be superficial, growing only in the top few layers of the skin, or deep, involving more layers of the skin. Superficial hemangiomas are initially bright red and usually elevated above the surface of the skin. Deep hemangiomas are blue or skin-colored and often feel warm to the touch. Some hemangiomas have both deep and superficial components.

Most patients have just one hemangioma, but some have multiple hemangiomas. About 60 percent of hemangiomas are located on the head and neck. Approximately 25 percent occur on the trunk and 15 percent are on the arms or legs. Hemangiomas may temporarily increase in size after crying or during colds.

Complications of Infantile Hemangioma

Hemangiomas are rarely painful unless the overlying skin breaks down, a complication known as ulceration. Ulceration occurs in about 10 percent of infants with hemangiomas, particularly in moist locations like the diaper area, armpit or lips.

Although hemangiomas are a growth of vascular tissue, severe bleeding is quite rare. Hemangiomas are a collection of small blood vessels, not balloons of blood that can burst. Bleeding, if it does occur, can usually be stopped with firm pressure.

Most hemangiomas can be correctly diagnosed with a physical exam combined with the child's medical history and the history of the birthmark, without the need for medical tests or biopsy. Deep hemangiomas may be more difficult to diagnose, as they can appear similar to other types of vascular lesions and soft tissue tumors.

If the diagnosis is unclear, your child may undergo an ultrasound or MRI. Rarely, a skin biopsy is needed for diagnosis.

When to Consider Treatment for Infantile Hemangioma

Most infantile hemangiomas do not need treatment, other than monitoring by the child's doctor during routine check-ups. For small hemangiomas in areas covered by clothing, for instance, no treatment is a good option. However, for hemangiomas in certain locations — particularly the face — treatment to prevent further growth or accelerate involution should be considered.

Your child should be evaluated by a vascular anomalies specialist if he or she has a hemangioma in any of the following locations:

  • The face, especially the central face (the eyes, nose or lips) or hemangiomas involving a large portion of the face
  • Tip of the ear
  • Around or behind the eye
  • "Beard area" and center of the neck
  • Over the lower spine
  • In the diaper area, in the armpit or in neck creases

Your child should also be evaluated by a specialist if he or she has:

Show More

UCSF Research & Clinical Trials

Other Resources


Reviewed by health care specialists at UCSF Benioff Children's Hospital.

Related Information

UCSF Clinics & Centers

Birthmarks & Vascular Anomalies Center
1825 Fourth St., Fifth Floor, 5B
San Francisco, CA 94158
Appointments: (415) 353-7823
Fax: (415) 353-7478
Appointment information