[Sleep-related headaches].

Headaches and sleep disorders are frequent and can be associated with each other. Some headache syndromes are related to certain sleep phases or circadian rhythms. These so-called sleep-related headache syndromes include specific types of migraine, cluster headache, chronic paroxysmal hemicrania, and the hypnic headache syndrome. Except for the latter, they were included in the International Classification of Sleep Disorders and are described in this article.