It is not pleasant to deal with hidden anger.  If you are living with repressed anger, it is time for you and the Spirit to talk about it.  Together, examine it.  Find out what its root is!  Deal with the root!  “The anger of man does not achieve the righteousness of God” (James 1:20).  Anger brings about other outcomes.  It hurts relationships.  It does not represent our Lord well.  It hurts your own spirit.  It is time to face it.  Confide in a counselor or a trusted friend.  Let the Spirit help you.