A strawberry mark is a common type of birthmark made up of a cluster of immature blood vessels that form a raised, red bump on the skin. The medical name is infantile hemangioma, and it affects roughly 4.5% of infants. Most appear within the first few weeks of life, grow rapidly during the first year, then slowly fade on their own over several years.
What a Strawberry Mark Looks Like
Strawberry marks get their name from their appearance: a bright or dark red, raised, bumpy area that resembles the surface of a strawberry. They can range from a few millimeters to several centimeters across and feel soft and compressible to the touch. Some sit right at the skin’s surface, while deeper ones may have a bluish tint because the blood vessels are farther beneath the skin. They can show up anywhere on the body but are most common on the head, face, and neck.
It’s easy to confuse them with other vascular birthmarks. A port-wine stain, by contrast, is flat and pink, red, or purple, caused by dilated capillaries rather than a mass of growing blood vessels. Salmon patches (sometimes called stork bites or angel kisses) are small, flat, pink marks between the eyes, on the eyelids, or on the back of the neck. The key difference is that strawberry marks are raised and grow, while these other marks are flat and stay the same size.
Why They Form
Strawberry marks develop when the process of building new blood vessels goes haywire in a small area. Stem cells that would normally form blood vessels in an orderly way instead multiply too aggressively, producing a dense tangle of tiny, immature vessels. Growth-promoting signals that encourage blood vessel formation are overactive in the area, driving the rapid expansion during the first months of life.
This isn’t caused by anything a parent did during pregnancy. Several risk factors do increase the odds: premature birth and low birth weight are the most significant. Only about 3.9% of full-term infants develop a strawberry mark, but that rate jumps to 14.3% among extremely premature babies (born at or before 32 weeks). Girls are also affected more often than boys.
How They Grow and Fade
Strawberry marks follow a predictable three-phase lifecycle. Understanding this timeline helps parents know what to expect.
The growth phase runs from birth to roughly 12 months, with the fastest spurts happening between 1 and 5 months of age. Some continue growing until about 18 months. During this phase, the mark gets larger, brighter, and more raised. This can be alarming, but it’s the normal pattern.
The shrinking phase typically begins around 18 months. The color gradually shifts from bright red to a dull purplish-gray, and the mark starts to flatten and soften. This phase is slow, stretching from about age 1 to 5.
The faded phase follows. About 50% of strawberry marks have completely resolved by age 5, and roughly 70% are gone by age 7. The remaining marks may continue improving through age 10 to 12. Over half of children end up with completely normal-looking skin where the mark was. In other cases, some residual changes remain: a faint scar, loose or redundant skin, a soft fatty lump under the skin, tiny visible blood vessels, or a slight color difference. Marks on the tip of the nose, lips, or near the jaw tend to have a higher chance of leaving behind some visible change.
When a Strawberry Mark Needs Attention
Most strawberry marks are harmless and require nothing more than monitoring. But location matters. Marks near the eye can interfere with vision development if they press on the eyelid or obstruct the line of sight. Marks on the nose or mouth can affect breathing or feeding. Hemangiomas in the diaper area are more prone to ulceration (skin breakdown) because of moisture and friction, which can cause pain and bleeding.
Marks in the “beard area,” the lower face, jaw, and front of the neck, carry a specific concern: they’re associated with hemangiomas in the airway, which can cause noisy breathing, a hoarse cry, or breathing difficulty. Hemangiomas over the lower spine sometimes signal abnormalities in the urinary, skeletal, or nervous systems underneath.
Large facial hemangiomas, generally those over 5 centimeters in diameter, may be part of a condition called PHACE syndrome, where the hemangioma occurs alongside developmental differences in the brain, heart, arteries, or eyes. About 31% of infants with facial hemangiomas covering 22 square centimeters or more (roughly 5 cm by 4.5 cm) meet the diagnostic criteria. Pediatricians screen for this when a large facial mark is present.
Babies with five or more hemangiomas on their skin are typically screened for internal hemangiomas, particularly in the liver. These internal growths can, in rare cases, strain the heart or affect thyroid function.
Treatment Options
Since most strawberry marks shrink on their own, many don’t need treatment at all. Active treatment is considered when a mark threatens vision, breathing, or feeding, when it ulcerates repeatedly, or when it’s growing very rapidly in a cosmetically sensitive area like the face.
The first-line treatment is an oral medication that slows blood vessel growth by blocking certain stress-hormone receptors. The FDA approved this specifically for proliferating infantile hemangiomas, and treatment is ideally started between 5 weeks and 5 months of age, during the early growth phase when the medication is most effective. The dose is gradually increased over the first two weeks, then maintained for about six months. Babies on this treatment need monitoring for low heart rate and low blood sugar, particularly at the start.
For smaller or more superficial marks, a topical version of the same type of medication can be applied directly to the skin. Laser treatment is sometimes used for residual redness or tiny surface blood vessels that linger after a hemangioma has mostly faded. In rare cases where a mark doesn’t respond to medication or leaves behind significant excess tissue, surgery may be an option after the mark has finished shrinking.
What Parents Can Expect
The hardest part for most parents is the first year, when the mark is actively growing and looks its most dramatic. Pediatricians will typically photograph the mark at visits to track its size objectively. If the mark is small, in a low-risk location, and not ulcerating, the standard approach is watchful waiting.
Day to day, strawberry marks don’t usually bother the baby. The exception is ulceration, where the surface breaks down into a small open wound. This is painful and can happen during the rapid growth phase, especially in areas subject to friction. Keeping the area clean and moisturized helps, and ulcerated marks often become a reason to start treatment.
For the vast majority of children, a strawberry mark is a temporary feature of infancy that fades steadily through early childhood, leaving little or no trace behind.