Here getting emotional is not bad for you if you look at the case of anger. The more they are displaying anger, the lower the stress responses.

Anger can sometimes be adaptive. We're showing for the first time that when you are in a situation that is maddening and in which anger or indignation are justifiable responses, anger is not bad for you.

Having that sense of anger leads people to actually feel some power in what otherwise is a maddening situation.

Anger triggers a sense of certainty as well as a sense of control.

Even if it doesn't result in a sea of voters going to the polls to take their anger out on the White House, what it may do is keep Republicans at home. That's a problem for them.

Analyses of facial expressions revealed that the more fear individuals displayed in response to the stressors, the higher their biological responses to stress. By contrast, the more anger and disgust (indignation) individuals displayed in response to the same stressors, the lower their responses.