My heart goes out to you on this.  You're very honest too in your understanding that this is a form of stress relief for you.   To some extent everyone "picks" something at least occasionally.  Some people bite their fingernails, some pick their scalps, some chew on their lip, etc.   So it's really a matter of degree - when it starts to change into a way to deal with anxiety.  When it gets more serious, some psychologists think it's a form of obsessive compulsive disorder (OCD) which makes sense to me.   I'm happy you've gotten the behavior under control and for other out there, please seek help if you are causing scarring.

As for your scars, you really will need laser treatments to help you and please look for an expert laser center so you don't waste your money. The Fraxel laser or fractioned CO2 laser would probably be best depending on how thick they are and your skin type  Dr. I