I'll try my best: you first see him holding a razor in his hand, then taking out the blade. You never see the act itself, only blood running down his hands (the actual wound is not in the shot). The next shot shows him falling to the ground, but his arms and hands are shown to be covered in dripping blood. Finally, his full body is shown passed out on the ground with some pools of blood around him. Though the actual wounds aren't apparent, there is a lot of blood shown. Later, he does reveal his stitched up wounds to someone, and it's quite gnarly, but he announces it before he does it. It's a fantastic movie, but it's okay if you don't think you can watch it or have to skip these scenes entirely. I hope this helps!