why my child is hyperactive?? not paying attention at all and dont give response when someone call him

A. Ok So I would like to tell you in this place a hyper activity is a disorder with a child and on top of that you are saying that your child is not even responding to its name then that’s a sign of an alert for you to be attentive towards your child because sometimes these things can happen when a child is having a delay in the growth in terms of brain and sometimes it could be mild autism as well so you please consult a child psychologist one