Anger is a powerful, complex, and natural emotion that is often characterized as bad, but in general is good for your health. A number of scientists believe that anger can trigger the fight or flight responses to perceived peril or injury, leading some to regard the emotion as an evolutionary plus. Research shows that anger is both psychological and physiological and can generate biological reactions that for all practical purposes are readying the body for intense physical action. Biological responses to anger include: quickened pulse, accelerated breathing, rise in blood pressure and adrenaline, increased energy hormones, dilated pupils, overheating, sweating, and abrupt headaches. Generally, milder forms of anger (e.g. irritation and annoyance) are reactions to everyday stresses, frustrations and disappointments. Anger is often a normal coping mechanism; however, out-of-control, extreme, unprovoked, and frequent outbursts of anger are not normal and can lead to destructive and dangerous consequences.