I have had the very same experience--a hyperpigmented upper lip as a direct result of laser hair
removal (I had IPL). I had originally gone to the
laser clinic to treat two small
sunspots--one on either cheek, which honestly, never really even bothered me that much but that I thought might clear up a bit with some IPL treatment. (When I think back on how little research I did at the time, I am horrified.