Ok my friend is becoming a Christan and he said he is going through a change read discription plz!?

ok my best friend is becoming a christain and he is seeing demons and they follow him EVERYWHERE and he has break downs and he said there could be more than one and all day they stare at him like some will move stuff or try to push him down the stairs i am concered cause he will freeze up and start shaking and now its happening to me what is going on!!!!!!