Stretch marks appear on the skin â most often the hips, abdomen, and breasts â from excessive stretching and the rupture of the skinâs tissue. When skin endures a period of rapid growth, it may cause tearing in the dermis (the elastic middle skin layer). This tearing is actually a form of scarring, called striae. Before stretch marks become visible, skin stretching creates inflammation; inflammatory cells activate skin matrix degradation. The pale striae with rough irregularities represent the areas of skin which suffered structural damage. Celtrixa is a revolutionary treatment designed to improve the appearance of stretch marks. By infusing skin firming peptides, in association with soothing and anti-inflammatory agents, skin becomes thicker and more uniform.