My (light-skinned asian) young adult son is considering subcision or saline subcision--perhaps in combination w/TCA CROSS--to reduce acne scars on his cheeks. A female relative nurse mentioned that her MD was skeptical whether saline subcision is aggressive enough to break the "tethering" of depressed acne scars. I'd appreciate your opinions about this and also how "mature" a scar has to be before it can be treated (my son's acne only cleared up w/in the last year). Thank you! Fujiko