MCA, short for Multitrepannic Collagen Actuation, is a therapeutic treatment that follows the same protocol as medical camouflage, yet excludes the use of any pigments. It can stimulate the healing process of scars or stretch marks that are either not completely healed or appear slightly indented compared to the surrounding skin. At times, MCA needling alone suffices, while in some cases, it may serve as a preparatory step before the application of pigments.