John O. (buzzby) - , reviewed Handbook of Headache Management: A Practical Guide to Diagnosis and Treatment of Head, Neck, and Facial Pain on + 6062 more book reviews
"...[the following chart shows] 13 categories of headache are subdivided into 129 different subtypes...." Gives me more of a headache reading it. Lots of 13+ letter words, like "sphenopalatine", so you'll have to dig your way through those.