More details like headache is continuous or frequent attacks, which part of head is affected, does she vomit during headache, any eye disturbances, any noises heard in ears, any ear discharge
(patients with Turner syndrome
are prone for ear discharge) etc are needed to determine cause of her symptoms.
It may be Migraine headache
but generally no associated earache. So it is important to examine her to find out from what she is suffering.
So please consult an ENT specialist/physician (internist) for this and management.