Acne scar treatment options: ① shallow atrophic scars: needle RF (60–70% improvement, 4–6 sessions), ② boxcar/icepick scars: deep needle RF + subcision (3–5 sessions), ③ rolling scars: subcision + filler/needle RF, ④ pharmacopuncture for inflammation healing, ⑤ herbal medicine for blood circulation/regeneration. Treatment 6–12 months. Avoid: aggressive acne treatment that worsens scars. Important: treat active acne first, then scars. Sun protection mandatory throughout.