Anger is a secondary emotion, an escape emotion, an anesthetic emotion. It is the emotion we escape to when the “root” emotion is too difficult or painful to feel at that time so we anesthetize it by burying it in our anger. The problem is that when we are angry “Sin lies at the door and its desire is for you.” (Genesis 4:7b) Then, as Cain was told, we need to “rule over it.” We will not be able to do that if that anger has too much power.
The thing that lends power to any emotion, but especially anger, is when we do not acknowledge it. Anger will grow until it cannot be ignored and it explodes. We facilitate ignoring it by giving it pet names which allows us to let it grow. Examine every situation you do not like to be in and see if there is not some anger there.