While blowing up is rarely the answer, holding your anger in isn’t good for you either. It may make you even more angry as time goes by. Instead, the first thing you should do is try to calm yourself down by whatever works for you (time to yourself, deep breathing, counting, etc.). Once you’re thinking clearly, make sure you EXPRESS your anger to whoever or whatever made you mad in a non-confrontational way. This will calm you down even more and help reduce anger quicker than trying to hold it in. Plus, it may help you solve whatever the problem was that started all of this in the first place.