|Tension-type headache (TTH) is the most common primary headache disorders. Chronic tension headache is a tension type headache that appears more than 15 days per month. Pathophysiologically myofascial nociception is important in episodic tension-type headache; however, central mechanisms (i.e., central sensitization) are preponderant in the pathophysiology of the chronic form. The measurement of the human skull based on CT images results are of great practical value in the fields of anatomy, clinical medicine, biomechanics study and head injury analysis. The total skull bone thickness is the total thickness of diploe and the external and
internal tables. Numerous studies have been used different radiological tests for assessment of cranial thickness like A-mode ultrasound, CT and MRI. The thickness and the breadth of the human skull are variable; and in general females have thicker skulls than males. There was no correlation between total cranial vault thicknesses with sex, age or body weight. There were no previous trials correlating tension headache and the thickness of the skull vault.