If I’m not mistaken, anger itself is never a sin. It’s what you do with your anger that can make it a sin or not. Obviously yelling at others would probably be a sin, as would breaking other people’s stuff. However, my question is not about anger directed at others.
My hairstyle combined with my hair type is a real PITA to comb. I’ve seen YouTube videos of people with the same style able to comb their hair in less than 10 minutes. However, for my hair it takes more like 10-20 on a good day. Because my hair is rather unruly, it can make me angry when it just doesn’t want to do what I want it to. Today I got rather mad at my hair and I yelled/growled at it.
I fail to see how this could possibly be a mortal sin. I did not intend to hurt anyone else. I just needed to let some of the anger out so I didn’t explode. :shrug: