Recurrent headache--a "habit pattern".
D000293:Adolescent; D000328:Adult; D002561:Cerebrovascular Disorders / Q000150:complications; D005260:Female; D006184:Habits; D006261:Headache / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011602:Psychophysiologic Disorders / Q000150:complications*; D019966:Substance-Related Disorders