Many marriages have been destroyed by uncontrolled anger. The feeling of anger is not sinful. Even God feels anger. Great social reforms have been motivated by anger. But uncontrolled anger has destroyed the lives of thousands. If you feel angry, admit it and ask God to help you take positive action.
One constructive step is to ask: “Am I angry because someone sinned against me? Or, because I did not get what I wanted?” If someone sinned, you should be angry. That is godly anger. However, much of our anger is distorted – things simply did not go our way. If this is the case, we need to confess our selfish response, accept God’s forgiveness and release our anger to Him.