Sometimes it is possible to hide one emotion and then replace it with another.
Perhaps there has been an event in your life that was very difficult and painful to deal with. It was easier to ignore sadness, and so you hid it. As if you were never sad. But every time there is a sad situation - you get angry. You have hidden your feelings of sadness and replaced it with anger.
Why have you replaced the sadness with anger?
Does expressing sadness mean weakness to you while expressing anger means strength?
Why are you ashamed and unwilling to accept it?
No emotion can be suppressed indefinitely. At some point, there may be an explosion that can affect your health or relationships with your loved ones.
Emotion is the messages from your soul and it shows whether you are on the right path or need to change something in your life.