Pregnancy Podcast Q&A: Why Do Birthmarks Happen?
Nov 5, 2025
Ever wondered about birthmarks? This discussion dives into their mysteries, exploring various types such as café au lait spots and hemangiomas. Learn how skin development affects these unique marks and why some fade while others remain. Discover the prevalence of vascular birthmarks and what to watch for regarding your baby's skin. Plus, get insight on when to consult a pediatrician and explore treatment options, including laser therapy. It's a captivating journey through the realm of your baby's skin!
AI Snips
Chapters
Transcript
Episode notes
How Birthmarks Form
- Birthmarks form from slight differences in how skin cells develop or function during fetal development.
- Melanocytes produce melanin, and variation in their behavior reveals pigment differences as the skin matures.
Pigmented Birthmark Types
- Pigmented birthmarks arise from clusters or misplaced melanocytes that create darker or unusual colors.
- Types include café au lait spots, moles (congenital nevi), and dermal melanocytosis (Mongolian spots).
Why Some Spots Look Blue
- Dermal melanocytosis (Mongolian spots) occur when melanocytes remain deeper in the skin instead of moving to the surface.
- Because the pigment sits deeper, these spots can look blue, gray, or greenish rather than brown.