I’m not completely convinced. There is no visible evidence of an injury. There has been no public release of info regarding the specific nature of the injury or the injury’s exact size or location. The next day, he appeared in public with a bizarre, fake-looking bandage. And the day after that there was no visible mark at all.
He is world-famous for lying and it is physically possible that it’s not his blood. Without some solid evidence, I’m just not convinced he was actually injured. He is absolutely the kind of person who would pretend a real victim’s blood is his own if it will bring him some media attention.