LadyDrea says:

Well, depending on how long you had the piercing, and how well it healed it may never go away, without plastic surgery in the area. However, you can hide it with makeup, using mortician’s wax or plasti-sil gel (a silicone product) and a plastic palette knife you can fill in the hole (I recommend the plasti-sill even though it’s a little harder to work with, because morticians wax melts) then using a good quality cream foundation (ben nye or Makeup Designory do nice ones, buy a couple of shades and mix for a perfect match) and a high quality latex sponge (Cinema Secrets, Makeup designory, and Ben nye all do good sponges) pat foundation over the filled hole, and then powder. With practice you should be able to make it disappear completely.
I know it sounds complicated, but it’s easier than it sounds, and just takes a little bit of practice, and maybe 10 minutes (and that’s at first, you should be able to get it down to no more than 5)