"rage issues" was among the list some psychiatrist wrote about me. I think Newground's words are rlly acurate. It has something to do with taking the situation out of your hands, something your brain learnt to take as a warning signal. I remember I was told people learn how to control rage during childhood (that's why adults *usually* don't throw tantrums)so if childhood was hell, people never learnt how to handle it in a good way.
I think understanding this is the best way of dealing with this issue.