Yep, its stretch marks. I've gotten them as a result of gaining and losing weight over the years and also from the birth of my son. They started out purplish pink and are now a whitish color and not very noticable. I think once I get to the weight I want to be and have my body toned up that they will be even less noticable. I may even try that Mederma. As of now Im not that worried about them.