Stretch marks, medically known as striae distensae, are a type of scar that develops when the skin is stretched too quickly, causing the collagen and elastin fibers in the dermis to break. While stretch marks are not harmful to your health, some people may find them unsightly. They often appear as long, thin lines on the skin, and they can vary in color from pink to red to purple. Over time, stretch marks may fade and become less noticeable, but they may never fully disappear.
Stretch marks are a common side effect of rapid weight gain or muscle growth. They can also occur during pregnancy, puberty, or when taking certain medications, such as corticosteroids. While there is no surefire way to prevent stretch marks, there are a few things you can do to reduce your risk: