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, try to express your anger to the source of the provocation in a non-confrontational way. This may calm you down even more and help reduce anger more quickly 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.