Screaming

Caden has started acting up after nap time. He just SCREAMS and wants to stay in his bed with the door closed.
Even if you let him do that he continues to scream. He gets all upset and when I make him come downstairs he will throw himself on the floor or bang his head on the floor or wall. (Wonder where he got that from....I used to bang my head on the floor when I was little)
I am trying to hold him and give him some extra attention to see if that helps???