We use many methods in the treatment of hollow or brown marks of acne (pimple) scars. In our clinic, forehead needle, collagen injections, stem cell therapy, treatment of acne scars with plasma energy and filling applications are the most frequently applied treatments. Depending on the condition of the acne scar, if there is active acne, it is started by treating it. Then, combined treatments are applied according to the condition of the hollow or stain.