 [ Symptoms ] my son is burning up and lethargic what could this be  he is so hot his clothes get hot and the cool rag i use on his head gets so hot its like i ran it under hot water he usually doesnt go to bed until 9 to 930 and wakes up around 12 am but last night he slept from 7 until 7 this morning this is very unusual his appetite has also gone down and i find he wont even eat his favorite foods i took him to the er 2 weeks ago and they said he had a viral infection could these issues be a result of that should i take him back to the doctor [ Disease ] before determining treatment your doctor will want to be sure that there are no other causes for your headache so it is likely the doctor will perform physical and perhaps neurologic exams in addition your doctor will ask you about your health history including questions such as these do other family members have migraines or other kinds of headaches do you have any allergies what is the level of stress in your life do you use medications such as birth control pills or vasodilators that could cause headaches do you exert yourself physically or notice that headaches start after coughing or sneezing your doctor may also request these tests to be sure that the headache is not caused by other factors blood tests imaging such as x ray ct scan or mri checks for infection bleeding or other medical problems that could cause similar symptoms