How can I get rid of hyperpigmentation around mouth? (photos)

I got laser hair removal on my upper lip a few times a while back (couple years ago) and I think it may have been the cause of this dark ring around my mouth. I was wondering if there is any way I can get rid of it. I have tried bleaching cream from the dermatolgist twice but it overly dries out my skin and looks bad for a few days after.


