I've been going crazy lately trying to figure out why I get new post-acne marks (aka dark red marks) after every breakout. I use the same regimen every singe day.

Morning: Neutrogena Deep Clean Cream Cleanser and Olay Moisturizer

Night: (Same cleanser), Mario Badescu Special Cleansing Lotion "C", and Tretinoin Cream 0.1%.

And, once a week, I use a 40% Lactic Acid Peel.

I'm not sure if it's the peel that's causing it, or the tretinoin cream, but I can't stand this at all. When I used the peel, my marks fade slightly and I get so happy about it. But before I know it, I get a new scar after a blemish disappears, and I have to deal with it as well. It's sort of like going backwards with my skin progress. I'm trying so hard to clear up my skin once and for all, and this is just disastrous. Can anyone tell me what might be causing it?