Do you mean PIH from old spots?

You could try using AHA on your back to speed up their disappearance.

I used Dan's AHA+ on my back when my mild acne was still active. It cleared up my acne & help reduce the marks from previous spots.

Oh that's good!! Did It remove them completly? Or just fade them a bit?

They have faded so much now, that they are barely noticable, and only because I know that they were there. Anyone else probably would never know that I had bacne.

I have some photos on the forums somewhere, but never thought to take any "before" photos, only the "after" results.

My bacne was similar to the first photo in theguynextdoor's thread:-

edit...the attached photo was one that I posted about 3 years ago, not long after I started using AHA+. My back's even clearer now. I still use AHA+, but only once a week now.

Oh that's not bad at all!! and I'm hopeful that the Aha will continue to clear it up:)