Why do people feel better after letting out their anger?

because when you go crazy your letting out all your physical stress, and although its an unhealthy way of showing your emotions, you let them out. instead of crying some people curse and swear or break things and belittle people, it makes you feel better because after crying and screaming you can take a deep breath and rest and reflect on the actual situation. Anger doesnt solve anything but without that stress you feel hopeful. whenever im mad i sleep it off and i wake up refreshed with a new outlook... also when you go crazy you get an adrenaline rush, and and endorphins are let out which makes you feel better