Stretch Marks & Scarring
Stretch marks, also known as striae, are a form of scarring on the skin, with an off-color hue. Over time they may diminish, but will not disappear completely. Stretch marks are caused by tearing of the dermis. This is often from the rapid stretching of the skin associated with rapid growth or rapid weight changes.
Scars are areas of fibrous tissue that replace normal skin after injury. A scar results from the biological process of wound repair in the skin and other tissues of the body. Thus, scarring is a natural part of the healing process.
Many types of acne leave a red or sometimes brownish mark on the skin after the lesion heals. These are temporary and go away in two to six months. They are not true acne scars. True acne scarring is a permanent depression, elevation, or white area on the skin. Acne scarring follows cystic acne (hard, tender, deep lesions) or sometimes very inflamed pustular acne (plugged pores with pus in them). The texture of a true scar is usually firmer than the surrounding skin.
There are also different types of acne scars. For example, one type of scar, called an "ice pick" scar, leaves a deep scar with a narrow opening at the skin, as if a tiny ice pick had punctured the skin.