Bloody mess???

[mj]

3-3-6

A player who is bleeding, has an open wound, has an excessive amount of blood on his/her uniform, or has blood on his/her person, shall be directed to leave the game, unless a time-out is requested by, and granted to, his/her team and the situation can be corrected by the end of the time-out.

It is still left to the official's judgement what "excessive" is. I personally have used the term saturated to opposing coaches who question my judgement of excessive.