Abstract:Background A tension-type headache (TTH) is the most common form of a headache, and what many people consider as their 'normal' a headache, in contrast with a migraine. Episodic TTH is characterized by a bilateral, pressing, tightening pain of mild to moderate intensity [1]. Chronic TTH is a disorder that evolves from episodic TTH, with daily or very frequent episodes of a headache lasting minutes to days. The 2004 International Headache Society criteria for chronic TTH are: headaches on 15 or more days a mont… Show more
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