Frustration The Rules Whats The Origin Of Aggressive Frustration?

Whats the origin of aggressive frustration? - frustration the rules

During the long intensive study (especially for exams) come, why do most people aggressive and anxious? allowing the smallest things.
Since it is for something to do that, not like (and they are well aware), but I would - why * decided to go for agro?.
If you answers are targeted:
* The origin-of-virulence of writing this.
* The work of writing and aggression in their thinking.
* When the scene kind of thinking is present in another part of the training of a child (to the value of standards in adolescence, office workers who) are written to provide many hours of work - this kind of aggression.

Godbless.Thankyou much.