As you make healthy, positive changes to the way your body looks and feels, it only makes sense that you might want to improve the appearance of your body’s largest organ, your skin. Stretch marks are a common concern, caused by rapid change in skin growth due to pregnancy or excessive weight gain or weight loss. Although they appear to be on the top layer of our skin, stretch marks are actually in the middle layer. This is what makes them difficult to remove with topical treatment alone. But we’ve learned about a DIY scrub that may affect tissues beneath the surface, for real change.