What is Daily Headaches, Chronic?
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Common conditions characterized by persistent or recurrent headaches (see HEADACHE). Headache syndrome classification systems may be based on etiology (e.g., VASCULAR HEADACHE, post-traumatic headaches, etc.), temporal pattern (e.g., CLUSTER HEADACHE, paroxysmal hemicrania, etc.), and precipitating factors (e.g., cough headache).