Anger is a natural emotion although most feared. If anger is channeled either by punching cushions, going to the gym or just having a rant to yourself it is healthy. Unhealthy anger is when it is directed at someone else. They say depression is anger turned inwards so you could be preventing depression by being angry. The root of anger is complex but is often derived from childhood. It is also easier to be angry than show the softer emotions such as tears - so anger could also indicate unhappiness - just a thought!