My class used trompe l'oeil which means "art means fools the eye" to make fake injuries. I had some fake injuries on my right fist, my chin, and around my left eye. First latex was put on areas of skin that the fake injuries were to go on. Then stage makeup was put on the latex after the latex dried. Finally fake blood was put on my fist, chin, and under my eye.
P.S. Nobody was hurt in the making of the injuries, because they are fake.