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

https://wiki-dale.win/index.php/22%25_of_Canadian_Men_at_Risk_of_Problem_Anger:_Is_That_Number_Real%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