I do different things due to my emotions.

When I'm nervous I play with my earring or watch.
When I'm angry I'll clench my fists.
When I'm board I'll chew the inside of my mouth and attempt to beatbox. (Sometimes I forget I'm sitting in a silent class doing maths).

I was sad at the dinner table and that's how I earned my blisters on my foot.
When I'm sad I'll play with my fingers or if I'm bear-footed I'll rub my little toe between my big and next-to-my-big-toe toe. I did it for so long I actually rubbed off the first layer of skin!
Now I'm stuck with this blister on my toe😔