We analyzed, retrospectively, 92 patients with headache to determine t
he changes in the order of frequency of causes with the development of
neuroimaging studies and its efficacy in the investigation of patient
s with headache. The type of headache was redefined according to the I
nternational Headache Society (IHS) diagnostic criteria, Migraine was
the most frequent cause of headache and the rest in decreasing order w
ere: tension-type headache, sinusitis, and epilepsy. The per centage o
f the findings relevant to headache in computed tomographic (CT) scans
, magnetic resonance images (MRIs), Waters' projection (radiographs),
and electroencephalograms (EEGs) were respectively 4.2%, 33.3%, 16%, a
nd 25%. Neuroimaging studies are not necessary in the routine evaluati
on of patients with headache unless there is an abnormality in the fin
dings. When it is needed, MRI, which has higher yield, can take the pl
ace of CT scanning. The most important point is taking a proper histor
y of headache and making a thorough physical and neurologic examinatio
n of the patient.