it is not necessary that it will come on any dispute but it does and really comes on those situation which we donot like to do. it can be of any type. some guys used to say that anger depends on mood. or on the behaviour of person. or it may depend on time also.
the best way of staying away from is to stay happy. whenever you donot feel good about any situation or any topic which you don't like. start laughing from inside but donot avoid that. cause avoidance can also vring anger again.
we have to manage the anger, so that it can be used as a weapon but in a rare situation.