A strawberry hemangioma is a bright red, raised growth on the skin caused by an overgrowth of blood vessels. It’s the most common benign tumor in infancy, affecting 4 to 10 percent of babies. These growths typically appear within the first few weeks of life, grow rapidly for several months, then slowly shrink and fade on their own over the next few years.
What It Looks Like
Strawberry hemangiomas get their name from their appearance. Superficial ones grow into bright red, raised, firm or slightly squishy bumps that can range from a small dot to a large patch several centimeters across. They’re usually well-defined with clear borders against the surrounding skin.
Not all hemangiomas look the same, though. Deeper ones sit beneath the skin’s surface and may appear as a bluish lump or even a skin-colored nodule with no obvious redness. Some are mixed, involving both the surface and deeper tissue, so they combine features of both types. The classic “strawberry” look applies specifically to the superficial variety.
Who Gets Them and Why
Hemangiomas are more common in girls than boys, in premature infants, and in babies with low birth weight. Having multiples (twins, triplets) also raises the likelihood. The exact cause isn’t fully understood, but the growth involves rapid multiplication of blood vessel cells in a localized area. This is what separates a hemangioma from a vascular malformation like a port-wine stain: a hemangioma is a tumor made of actively dividing cells, while a malformation is a structural defect in blood vessels that was present from the start and never goes away.
How They Grow and Shrink
Hemangiomas follow a predictable three-phase cycle. The first phase is rapid growth, called proliferation. The fastest expansion happens between about 5.5 and 7.5 weeks of age, and the most significant growth overall occurs between 1 and 3 months. Most hemangiomas reach their maximum size by around 9 months.
After that comes a plateau phase where the growth stabilizes. Then the slow involution phase begins, where the hemangioma gradually shrinks and fades. In 90 percent of cases, regression is complete by age 4. The bright red color fades to a dull pink or grayish tone as the blood vessel cells are replaced by fatty tissue.
What It Leaves Behind
Many parents hear that hemangiomas “go away on their own” and assume the skin will look completely normal afterward. That’s not always the case. More than half of superficial hemangiomas leave some kind of permanent mark after they’ve fully resolved. Among those that completely disappear, roughly 70 percent still have at least one residual change to the skin.
The most common remnants are tiny visible blood vessels (spider veins on the surface), extra fatty or fibrous tissue that creates a soft lump, and changes in skin color, either lighter or darker than the surrounding area. Thicker hemangiomas are more likely to leave noticeable traces. Some children are left with loose, stretched-out skin in the area where the growth used to be. These residual changes can often be improved later with laser treatments or minor procedures if they’re cosmetically bothersome.
How It’s Diagnosed
Most superficial strawberry hemangiomas are diagnosed on sight during a physical exam. The combination of a red raised bump that appeared shortly after birth and is growing rapidly is usually enough for a pediatrician to identify it. At the earliest stage, a hemangioma may start as a flat red patch and could be confused with other red birthmarks, but the rapid growth that follows within weeks confirms the diagnosis.
When a hemangioma sits deeper beneath the skin or affects internal organs, imaging becomes necessary. Doppler ultrasound is the go-to first test. During the growth phase, it shows a well-defined mass with intense blood flow and a characteristic arterial pattern. As the hemangioma begins to shrink, the ultrasound shows less blood flow and brighter areas where fatty tissue is replacing the blood vessels. This test is widely available, painless, and doesn’t involve radiation, making it well-suited for infants.
How It Differs From a Port-Wine Stain
Parents sometimes confuse hemangiomas with port-wine stains, but they behave very differently. A port-wine stain is present at birth as a flat, red or purple patch with irregular borders. It doesn’t grow rapidly, doesn’t raise up off the skin in the early weeks, and critically, it never goes away on its own. Over time, port-wine stains actually darken and can become thicker and more nodular as the abnormal blood vessels expand deeper into the tissue.
A strawberry hemangioma, by contrast, is rarely visible at birth. It appears in the first few weeks, grows quickly, then shrinks and fades. If your baby has a red mark that was clearly there from day one and isn’t changing rapidly, it’s more likely a vascular malformation than a hemangioma.
When Treatment Is Needed
Most hemangiomas don’t need treatment and are simply monitored as they go through their natural cycle. But location matters. Hemangiomas near the eyes can interfere with vision development. Those near the nose, mouth, or throat can obstruct breathing or feeding. Hemangiomas in the diaper area are prone to ulceration, which causes pain and increases infection risk. Large facial hemangiomas may also be associated with other underlying conditions that need evaluation.
Current guidelines recommend that infants with potentially problematic hemangiomas be referred to a specialist ideally by 1 month of age. Because the most rapid growth happens in the first few months, early referral gives the best window for intervention before the hemangioma reaches its peak size.
Treatment Options
When treatment is warranted, oral propranolol (a beta-blocker originally developed for heart conditions) is the standard first-line therapy. It’s FDA-approved for infants from 5 weeks to 5 months of age with growing hemangiomas. The medication works by narrowing the blood vessels within the hemangioma and slowing the growth of new ones. It’s given as a liquid twice daily with meals, and doctors typically start with a low dose and gradually increase it over the first couple of weeks.
Propranolol is effective for most infants, but it does require monitoring. It can lower heart rate and blood pressure, and in rare cases cause breathing difficulties, so the initial doses are usually given under medical supervision. Parents are advised to watch for signs like unusual tiredness, cold hands and feet, or wheezing. Girls have a somewhat higher chance of the hemangioma returning after the medication is stopped.
For small, thin, superficial hemangiomas, a topical beta-blocker applied directly to the skin is sometimes tried as a gentler alternative. A randomized trial of topical timolol found it was well tolerated with no systemic side effects, and it improved the color of hemangiomas within four weeks. However, it showed limited benefit in actually shrinking lesions. At 24 weeks, complete or near-complete resolution rates were similar between the medication and placebo groups (42 percent versus 36 percent). So while topical treatment may help with surface redness, it’s not a reliable substitute for oral medication when a hemangioma genuinely needs to be treated.