Is there any possiblity lemon juice could DARKEN acne scars?

Tanya Asked: Is there any possiblity lemon juice could DARKEN acne scars?I have a lot of acne scars on my forehead, and I want to get rid of them. I googled it, and it seemed like people got best results using lemon juice.So I got some lemon juice and mixed it with sugar so it was sort of a paste. Then I used it as a scrub on just a part of my forehead, incase it made me break out, or it gave me a rash, or something like that. I left it on for about 30 seconds, and then washed it off in warm water. Then I put on some face moisturiser, since my skin is kind of dry and flaky. I did this with

acne