question: i'm not the one that has this problem... but a guy that i know, getas stressed alot, and he would hit his head on something, or even punch it.  he went to the doctor because his head felt weird and they said that he needs to stop getting stressed and all that stuff.  after that something happened with him and his girl friend, and he did it again.  now he says the pain in his head comes very painful, and he says his head feels "stupid"  and its a very sharm pain.  it comes and goes.  what can it be?