CHRONIC-NONPROGRESSIVE HEADACHE (CHRONIC-DAILY HEADACHE)
The prevalence of chronic-nonprogressive (or chronic-daily) headache during adolescence is 0.2 to 0.9 percent.24,25 No specific diagnostic criteria have been established, although ongoing studies in children define chronic-nonprogressive headaches as those lasting four or more hours and occurring 15 or more times a month for a period of four or more months.5 Many adolescents have continuous, unremitting daily headache.