Anger derives from a sense of frustration. It is a natural and productive survival mechanism that provides us with a physical and emotional surge of energy when we need it most - to protect and defend us from a threat of attack. Perceived attacks can be triggered by an insult, physical assault, injustice and unfairness. However, anger can become a problem when it becomes to intense, occurs too frequently or leads to aggressive behavior. Psychological therapy teaches techniques to reduce aggression and to effectively manager anger.