maw,
You GOT the stretch marks from gaining weight as the skin tore slowly to accomodate the bigger belly. Stretch marks are the healing scars as the body patches this up. When chubby you didn't notice them so much.
But as i97 says, you see them now because you've deflated the balloon.
There is no cure but some people claim fair results with daily Vitamin E rubbed onto each scar (poke a capsule with a pin and that provides enough for a couple days!)
I got some on my keyser from growing 8 inches in a year as a bone thin pre-teen...they've been with me for decades and will be with me in my coffin! Just part of "growing up?"

