Modern scientists consider anger as a natural emotion experienced all humans at times. Some of them view anger as part of the fight or flight brain response to the received threat. Anger is a response of having been offended, wronged or denied. Everyone gets angry. You may "lose your cool" or "hit the roof." It's a part of being human; it's the energy seeking expression.
When something makes you angry, you feel excitement in your body and emotions. Your brain orders to pump the hormone adrenalin into your blood. You are full of energy, alert, ready for action. Anger helps us survive giving us the strength to fight back or run away when attacked or faced with injustice. Anger gives us a way to express negative feelings, or motivate to find solutions to problems. So, anger can even be a good thing.
But anger must be released correctly. You have heard the expression, "Get your anger out" to get rid of it. Freud used the analogy of a steam pot that will burst if the energy is not released. Physiological responses to anger include an increase in the heart rate and enhance of the blood flow to the hands, preparing them to strike. Perspiration increases.
Anger assists to mobilize psychological resources for corrective action and stimulates people think more optimistically. Dangers seem smaller, actions seem less risky and ventures seem more likely to succeed. Angry people make more optimistic assessments and risky decisions.
However, for most situations anger clouds our judgment. Increased blood pressure and other physical changes make it difficult to think reasonably and harm your physical and mental health. Uncontrolled anger feelings can negatively affect personal or social well-being. An angry person may lose his objectivity, empathy, prudence and may cause harm to others. Anger leads to destructive and violent behaviour.