Stretch marks are a form of skin scarring caused by tearing of the dermis, often the result of the rapid stretching of the skin associated with rapid growth. Stretch marks may also be influenced by hormonal changes associated with puberty, pregnancy or muscle building. Stretch marks first appear as reddish brown or purple lines that gradually fade to a lighter shade. They can appear anywhere on the body, but are most likely to appear in places where larger amounts of fat are stored. Most common places are the abdomen, breasts, upper arms, underarms, back, thighs (inner & outer), hips and buttocks.
