Anger usually acts as a pressure valve for stress you haven't been able to...

https://www.charliebookmarks.win/anger-often-feels-like-trapped-pressure-that-keeps-building-until-you-snap-if

Anger usually acts as a pressure valve for stress you haven't been able to release. When you keep pushing, it shows up as a tight jaw or shoulders that never fully relax. It keeps you awake at night too