Anger usually acts as a pressure valve for stress you have been carrying too...

https://www.web-bookmarks.win/anger-usually-hides-deeper-pressure-it-shows-up-when-your-jaw-stays-clenched

Anger usually acts as a pressure valve for stress you have been carrying too long. You might notice it in a tight jaw, stubborn shoulder tension, or restless sleep. It is not about silencing your voice