Dermapen micro-needling kick-starts the production of collagen, which softens the appearance of wrinkles and fine lines, improves skin sagging and reduces pore size. Acne scarring will improve from micro-needling, as will the overall texture of the skin, creating smoother, firmer, more toned skin. Micro-needling is mostly used on the face, but the décolletage and hands may also be treated during the same session.