Positive result of expressing anger

Anger kept inside can damage mental and physical health .How you express it is the important thing.

As needed as expressing other emotions.
Each Yes is meaningful when written on the board of your No´s.

Of course, frequent anger about trivialities is childish.
Of course, anger don´t give excuses for lack of respect to the ones you love.
Easy anger is weak anger.

Expressing anger (when there is a reason for):

Set emotional boundaries, lines on what is a limit for you and your values.

Is part of standing for what is right.

People are aware of your feelings.

No positive result

Depends how you express it. Sometimes it really clears the air and allows you to move forward.