Skin needling works by creating precision trauma on the affected area this sends signals to the brain to send collagen and lymphatic fluids to the area in order to repair the traumathe scar pigment aged skin is then repaired as a by product of the trauma the derma roller can help improve the appearance of stretch marks acne and surgical scars wrinkles and anti aging ice pick and chickenpox scars treating or reducing cellulite enlarged pores lack of firmnes age spots 38 sun d