This is good advice. Dunno why it is being down voted. "Let him physically hurt you" is, oddly, great advice. I've let this happen too with generally good res

This is good advice. Dunno why it is being down voted. "Let him physically hurt you" is, oddly, great advice. I've let this happen too with generally good results. Kid's emotions have run high, he feels he's unfairly treated, is ignored and powerless ... and consequently is unable to communicate without histrionics. Pinching or pulling hair is his attempt to show he's not having anymore of the shit the world's thrown at him. So let him express himself like that ... this time! Then - when he's calm - ask him to explain what he felt and thought. Then ask "Was pulling my hair the right thing to do? Can I pull your hair to show you how it hurts? ... Exactly!" You'll earn your reward when a 6 year old comes to you, on his own, unasked, to apologise for hurting you.