I'm trying a derma-roller now actually. I've only used it once - it didn't hurt nor did it draw blood - but the key is allowing your skin to heal so I can't really comment yet. I won't be rolling again for a few more days, Monday at the latest. But I read a number of reviews and it seems to work but I wouldn't guarantee results for everyone. If I think to, I'll post my fingers after some time has passed or after I've seen a change (*fingers crossed*).
I just ordered one excited to try it out, even tho I'm 50 lbs away from goal I figure I'd try and get rid of these stretch marks, well get them to fade
I've used derma rollers in the past and they definitely do help reduce stretch marks. I wasn't very consistent when I rolled but I still saw improvement on my arms.
They're never going to get rid of your stretch marks but they can make them less deep and noticable. If you can afford getting one and if you're willing to educate yourself in how to do this properly, then I'd definitely recommend it.