Suggest Treatment For Clearing Cut Mark Caused During Shaving.

hi, my name is jason, abotu 1 year ago, i shaved my mustache and apparently, i got cut and received a dark mark, which i thought it was going to fade away, until i realised its been over a year and its still there. i've tried lots of things such various creams, etc, but none of them seem to work. can you suggest me something? its really embarrasing to go to college like this. thank you