Anger isn’t just a temper problem. Usually, it is built-up pressure from work...

https://kilo-wiki.win/index.php/Why_You%E2%80%99re_Always_on_the_Verge_of_Snapping:_A_Guy%E2%80%99s_Guide_to_Recognizing_Anger

Anger isn’t just a temper problem. Usually, it is built-up pressure from work or home that has nowhere to go. You might notice it as a clenched jaw or tight shoulders at the end of the day. It also shows up when you can’t switch off at night