If you think that stretch marks are just simple scars etched on the skin because it has been stretched too much, then you should think again. Not many people are aware of what stretch marks really are which is why it becomes too easy for them not to care about it. But basically, these white or red scars on the surface of the skin are caused by the production of glucocorticoids, a hormone that is commonly produced by pregnant women. Such hormone inhibits the production of collagen and elastin, two enzymes that are responsible in keeping the skins elasticity and firmness. With decreased production, the skin rips on the surface causing scares that may be permanent if not treated immediately.