I was in a car accident about 10 months ago, from which I got a moderately deep cut right below my lip. It seems like it has healed completely, but has left a noticeable scar. The scar itself has a faded look but it looks worst than it is because it's pushing some skin upward, giving it a bumpy look. I was wondering if using retinol cream would help with this scar?? Could retinol loosen up that scar? Thank you.