The other night we all saw it at UFC 129 when Mark Harmon’s forehead blew up like a softball. Now I for one thought the fight should 
have been stopped because a guy like Mark isn’t going to stop for nothing. He is like a machine with the Pride of a Lion and you could’ve broke all 10 of his fingers and he still wouldn’t say that he was done. So, it is up to the cool heads in the octagon, the refs. Anyway, that is my two cents.
So, why did I bring this up well I just got back here from sherdog.com and they wrote a great article about Hematomas. Not a lot is known about this type of injury but it is nothing to play around with especially when it comes to continued battering on the same place there is already and injury. Like Sherdog points out:
Injuries and the sport we love MMA,“Any trauma to the tissues of the body can result in a hematoma. If only the low-pressure capillaries in the skin are disrupted, the hematoma that develops is usually no more than a simple bruise. A larger and potentially more serious hematoma develops if veins are damaged. Hominick’s injury appeared to be an even more significant form of hematoma: one caused by arterial bleeding. “