if she is not feeling better. like her "old self" in a few more days the medical provider is really obligated to run a series of diagnostic tests to ascertain the reason for her fatigue. clinician often wait a week before running diagnostic tests since viruses (a common reason) usually last this long. some viruses however like mononucleosis can last much longer. she also needs to be checked for anemia.
my 9 yr old daughter has been extremely fatigued for 3 days now she is usually very energetic even sick any causes? . she has been not feeling well since tuesday june 4 2013 he stmach is queasy but she is really lethargic and this is way out of her normal behavior. doctor diagnosed her fatigued with no reason and did not perform any tests.