He has a headache. His headache started an hour ago. His head feels like it will explode. Of course, his head wouldn’t explode. It just feels that way. The headache is in the back of his head. That is where his headaches usually are. Sometimes he has headaches on the top of his head. Sometimes he has headaches in the front of his head. Sometimes his headaches are between his eyes. Sometimes his whole head hurts. But usually the back of his head hurts.