I am an aggressive child. is this a symptom for a particular condition or disease?

Not necessarily.: Do you seek dominance? Do you like to self advance at the expense of others? Do you distain the truth or at war with it? Can you exercise control/impulses? Do you only like the senario: "i win-you lose." if you are saying yes to all of these questions-the aggressive traits can be a symptom for a "disorder" that needs psychiatric/psychological attention. Not being provoked is worrisome.