Headaches
Causes of Headaches
According to the International Classification of Headache Disorders (ICHD), there are four primary types of headaches: migraines, tension-type headaches, cluster headaches and other primary headaches. Secondary causes of headaches include head or neck trauma and injuries, stroke, intracranial hemorrhage, and vascular malformations.
Migraines:
The underlying cause of migraines is unknown. Research indicates that genetic factors play a role in who develops migraine headaches. Hormone levels are also a factor, and migraine headaches are three times more common among women than men. While the cause of migraines is unknown, there are a number of triggers, which are thought to instigate a migraine attack, though the strength and significance of the correlation are uncertain. Commonly reported triggers are stress, hunger and fatigue.