To get angry only makes bad to ourselves

To get angry only makes bad to ourselves.
The emotions affect our body fisically, our own emotions affect us and nobody else, the angryness makes us to feel bad, and only to ourselves (unless we make something to make anothers to feel the same).
If we get angry because another person gets something we wanted, the person who feels bad about our angryness is ourselves, the other person probably even would not know it.
Considering what it is above to get angry is a really stupid behaviour and it goes against our health and happiness.