my son is 10 years old. for the last year and a half one to 4 times a mth. he throws up all day, it always begins with the morning he has a headache and /or is very tired. the activities at school or home is no different, his eating habits don't change, no new foods each time, he goes to bed between 8p.m. and 9p.m. each night, he has had test run on him, no elevated blood count, not anemic, nothing wronge with thyroids. what could we have the doctor check for now?? when he is throwing up the only comlaint is the throwing up and a headache, or is overly tired and a need to sleep. these episodes only last during the course of 8-10 hours, then he wants to eat is is normal again. help!!!