Does Lip Surgery Exist For Uneven Top Lip? (photo)

I am now 28 but when I was 16 I slipped in some ice and my mouth hit the ground which caused my two front teeth to cut into the top of my lip there was a lot of blood and at one point I think that I even spat out some of the fat from inside of my lip. So as a result my top lip kind of hangs down lower on one side than the other it's hardly noticeable unless I point it out but I would like to have my lip fixed so that it won't hang any more. Also I never saw a doc It healed on its own