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

https://www.yankee-bookmarkings.win/anger-isn-t-just-a-personality-trait-it-is-usually-internal-pressure-building

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