Temper, Temper, Temper

What are we going to do? I pray that this is just a phase but Edward has gotten a temper going on ever since he turned 4 last month. He has taken to hitting, biting, screaming so hard his face turns beat red (I can only imagine what that is doing to this little guys blood pressure level), chocking and clawing at us when we are trying to punish him or he is not getting his way. Does anyone have any suggestions? I just don't know where all this anger is coming from.