I need some advice, when my two year old throws a tantrum, doesn’t get what he wants, etc. he throws…

I need some advice, when my two year old throws a tantrum, doesn’t get what he wants, etc. he throws his head into whatever is closest to him. He throws his head into the walls, the floor, dressers, whatever is around. It’s concerning because he hits his head so hard, I’m worried to many hits to the head will seriously hurt him. What can I do to prevent it?