Can Birthmarks Grow?

Feb 7
2025

Birthmarks are common skin anomalies that can appear in a variety of shapes, sizes and colors. Many people have questions about these marks, particularly whether they can grow or change over time. Understanding the nature of birthmarks is important for both aesthetic and health reasons. The Vascular Birthmark Center, with locations in New York and Los Angeles, answers this important question.

What Are Birthmarks?

Birthmarks are blemishes on the skin that can be present at birth or develop shortly after. They can be classified into two main categories:

1. Vascular birthmarks, like port wine stains and hemangiomas, are caused by abnormal blood vessels in the skin.
2. Pigmented birthmarks, such as moles and café-au-lait spots, result from an excess of pigment cells (melanocytes).

Can Birthmarks Grow?

The growth of birthmarks tends to vary based on their type and individual circumstances:

• Vascular Birthmarks: Some vascular birthmarks, like hemangiomas, can indeed grow during the first year of life. They may initially appear as a small red or purple spot but can enlarge significantly before beginning to shrink or fade. Many hemangiomas will gradually diminish over time, often disappearing completely by the time a child reaches school age.
• Pigmented Birthmarks: Pigmented birthmarks may change in size or color as a person ages. Moles might become larger or darker, particularly during periods of hormonal changes like puberty or pregnancy. It’s essential to monitor these changes, as they could indicate potential health issues.

Factors Influencing Birthmark Growth

Several factors can influence the growth or change of birthmarks:

Infantile Growth

Certain types of birthmarks, particularly vascular ones such as hemangiomas, are known for their rapid growth during the early months of a child’s life. This growth phase is typically followed by a period of stabilization and, in some cases, regression. It is crucial for parents to closely monitor any changes in these birthmarks and consult with a dermatologist to gain a thorough understanding of their implications.

Hormonal Influence

Hormonal changes associated with puberty, pregnancy or menopause can significantly affect the appearance of birthmarks. For example, moles may darken or increase in size during these hormonal fluctuations. Regular check-ups with a dermatologist are recommended to ensure that any changes are benign and to address any concerns.

Environmental Factors

Exposure to sunlight can also impact the growth and appearance of pigmented birthmarks. To maintain skin health and minimize changes, it is essential to protect the skin from UV rays through the use of sunscreen and other protective measures.

When to See a Birthmark Specialist

Most birthmarks are harmless and don’t require treatment. However, it’s crucial to consult a healthcare provider if you notice any significant changes in a birthmark, such as:

• Growth or expansion
• Changes in color or texture
• Bleeding or crusting
• Pain or itching

These changes may warrant further examination to rule out conditions such as skin cancer.

Every Birthmark Is Unique

While many birthmarks can grow or change over time, this growth is often benign. However, staying vigilant and monitoring any changes is essential for skin health. If you have concerns about a birthmark, consult with a specialist at The Vascular Birthmark Center who can provide a thorough evaluation and peace of mind. Birthmarks are a natural part of our skin’s landscape, but awareness and knowledge empower us to manage them wisely.