Are these stretch marks

I have the purple scar like lines on my butt cheeks and was wondering if they were stretch marks. If not does anyone know what they are ? The reason why I'm questioning it is because I'm only 16 and was confused if it's at an early age to get these? (They're Mainly at top)

Thankyou x

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors