Stretch marks or striae (singular stria), as they are called in dermatology, are a form of scarring on the skin with an off-color hue. They are caused by tearing of the dermis, and over time can diminish but not disappear completely. It is a common misconception that stretch marks are solely the result of the rapid stretching of the skin associated with rapid growth (common in puberty) or weight gain (e.g. pregnancy or muscle building) that overcomes the dermis's elasticity. Stretch marks are influenced by hormonal changes associated with puberty, pregnancy, muscle building etc. Although stretch marks are generally associated with pregnancy and obesity, they can also develop during rapid muscle growth. Medical terminology for these kinds of markings includes striae atrophicae, vergetures, stria distensae, striae cutis distensae, striae gravidarum (in cases where it is caused by pregnancy), lineae atrophicae, striae distensae, linea albicante, or simply striae.

They first appear as reddish or purple lines, but tend to gradually fade to a lighter color. The affected areas appear empty and are soft to the touch.

Stretch marks occur in the dermis, the resilient middle layer that helps the skin retain its shape. No stretch marks will form as long as there is support within the dermis. Stretching plays more of a role in where the marks occur and in what direction they run. Stretching alone is not the cause.

Stretch marks 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 (especially near the belly-button), breasts, upper arms, underarms, thighs (both inner and outer), hips, and buttocks. They pose no health risk in and of themselves, and do not compromise the body's ability to function normally and repair itself.

The glucocorticoid hormones responsible for the development of stretch marks affect the epidermis by preventing the fibroblasts from forming collagen and elastin fibers, necessary to keep rapidly growing skin taut. This creates a lack of supportive material, as the skin is stretched and leads to dermal and epidermal tearing. If the epidermis and the dermis has been penetrated, laser will not remove the stretch marks.

Skin subjected to more stretching force than it can handle will tear. Hormonal changes and genetics influence the skin's capacity to withstand stretching forces, as do diet and [possibly] exercise.

Recommended Treatments:

Laser Genesis

My Cells