Typically, headaches are divided into two categories: primary and secondary. Primary headaches, such as tension headaches or migraines, are usually caused by overactivity in the pain-sensitive structure of the brain. Secondary headaches can usually be linked to other causes, such as an underlying health condition, stroke, brain tumour, toxic exposure, or changes in brain pressure. The side effects of medication can also trigger secondary headaches. … Continue reading The Importance of Differentiating Between Primary and Secondary Headaches