Comment on WHAT'S UP DOC? Stretch marks sign of childhood growth

Q: My son has never been overweight, but he has developed what looks like stretch marks on his lower back. Is this something I should be worried about? What can cause this?A: Striae distensae (the medical name for "stretch marks") are a very common skin discoloration/scarring. They usually start off along lines of skin tension as red/purple linear streaks of atrophic skin, typically a fraction of an inch up to half an inch or more wide (and hence are [...]