Anger often acts like a pressure valve for stress you haven't been able to...

https://mike-wiki.win/index.php/Your_Shoulders_Won%27t_Drop:_The_Physical_Cost_of_Ignoring_the_%22Slow_Burn%22

Anger often acts like a pressure valve for stress you haven't been able to release. When you carry the weight of work and home life, it shows up as a tight jaw, knotted shoulders, or broken sleep