I don't think that they're are any rules against tatoos. We compete in a lot of Colorado tournaments throughout the year, and it would probably be safe for me to say that more than have the athletes there have tatoos. I think you're considered pond scum or something if you don't have one. But I have also seen wrestlers in Kansas compete with them. So I wouldn't be too worried about covering it for a match. But I am sure if you did have to a coach would tell you before hand, or a referee would inform you during skin check.