aggressive behaviour

My son is 3 and a half years old and started nursery 3 weeks ago. whilst at school he has been really aggressive to the other children e.g. hurting them them for know reason what so ever. he throws temper tantrums to were he throws his self to the floor not caring about hurting hisself or who or what is around him. C ould he have ADHD?

[Kevin Kennedy, Ph.D.]

Aggressive behavior is not indicative of ADHD. Three-year-olds are at a stage in their development when they are learning to manage the strong emotions that accompany frustration of their wishes. They require sound limit-setting around aggressive behavior, and the pre-school program should be firm in setting limits on him, including a plan for discipline (e.g., time out) if he displays any aggressive behavior.