Causes of Headaches And How To Avoid Them

8. Secondary Headache Causes

Secondary headaches may vary in severity more than primary headaches because they are typically due to a symptom of an underlying disease that may activate pain-sensitive nerves in the head. Common causes of secondary headaches include a sinus infection, blood clot, brain aneurysm or tumor, arterial tear, dehydration, dental problem, ear infection, concussion, glaucoma, hangover, hypertension, meningitis, influenza, brain inflammation or inflammation in the lining of the arteries, overuse of pain medications, stroke, panic disorder or panic attack, and increased pressure in the skull, known as idiopathic intracranial hypertension.