Sometimes mine just happen for no reason. During some of them I just want to be by myself for a long time, and during some of them I can't stand to be alone. Sometimes
being by myself will trigger it. I'll hear a noise and think it HAS to be someone breaking in.
Trichotillomania. (That word's a mouthful.

) People with trich have a compulsion to pull out their hair. For some reason, for them, well
us, pulling out hair relieves stress. Usually, though, it'll end up causing even more stress, especially when people ask, "What happened to your hair?!"
I have a mild case--I can usually "snap out of it" soon enough that I'm able to cover the "damage". Some people with trich have to wear wigs or scarves all the time because their hair is so sparse, and they have trich episodes much more often than me. Stopping is not as easy as someone else saying to you, "Quit pulling your hair, stupid!"... it's a compulsion... I can't control having the compulsion. I can only control my response to it. Sometimes I can "break" the compulsion before I do anything. But sometimes I just can't.