Answers are grounded in this paper and cite their sources.
Episodic tension-type headache is a highly prevalent condition with a significant functional impact at work, home, and school. Chronic tension-type headache is much less prevalent than ETTH; despite its greater individual impact, CTTH has a smaller societal impact than ETTH.
No takes yet. Share an insight, caveat, or question.
Brian S. Schwartz (1998) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: