my son is 16 yrs old, he was doing some squats at school to warm up for extra curricular activity. after that, he went to sit down at a desk and all of a sudden he felt this sharp pain that radiated from his neck. to be more specific on the area... it looks like its behind his ear, along side the neck and down to his trapezes. it hurts to move and he is in pain. we went a dr already, but she said it might a muscle spasm. but if he gets a fever, to bring back to the hospital. what would be the cause for fever? she also prescribed ibruprofen and told him to apply heat.