Anger often acts as a pressure gauge for stress you’ve been carrying too long....

https://mag-wiki.win/index.php/Is_Your_Anger_a_Character_Flaw,_or_Just_a_Pattern%3F

Anger often acts as a pressure gauge for stress you’ve been carrying too long. You might notice it in a tight jaw or shoulders that never quite relax, or perhaps in the way your sleep suffers