What Are Secondary Headaches and What Causes Them?

Primary headaches account for 50% of reported cases. These are caused by other health problems, with triggers ranging from dehydration and caffine withdrawal to head and neck injury and heart disease. Not all headache pain comes from swelling, tense muscles. And inflamed, sensitive nerves cause varying degrees of discomfort in each headache - but all cases are reactions to some cranial irritant. Doctors have classified over 150 diagnosile types,. All with different potential causes, symptoms and treatments. But will take just one common case, a sinus infection, as an example. The sin s are a system of cavities that spread behind our foreheads, noses and upper cheeks. When our immune response heats up