Anger is about our ego feeling that we have been betrayed and/or hurt in some way, say the Angels. We need to find out about our own anger, and why we feel anger at our self before we can see our anger at others. Remember, the outward reflection is from the inside of us.
When we learn to forgive our self, then, moving on to forgive others becomes so much easier. Anger is manifested by the escalation of emotion around one or several topics that you and another are dealing with. If things do not go your way, you become angry. And, so does the other person. Most often anger erupts between couples.
What are your triggers, and why are you being triggered at that moment? What is the lesson to be learned.