Take this from a woman who gained 55lbs while pregnant (thank to gestational diabetes) and had a 9lbs baby... I had some pretty insane stretch marks. They're not gone completely (and never will be without surgery) but I have managed to diminish them quite a bit. You need a derma roller, which, I'm not gonna lie, it's painful, and a VERY good stretch mark lotion or a scar removing product like Mederma. Apply the lotion/cream AFTER using the derma roller. You can use it 2-3 times a week. They may never go away completely, but you can definitely make them less noticeable!