This article from Cleveland Clinic's Health Library comprehensively covers sleep disorders. It defines sleep disorders, categorises them according to the International Classification of Sleep Disorders-3R (ICSD-3R), and details common types such as insomnia and sleep apnea. The text explains symptoms, causes, diagnosis (including sleep studies), and treatment options, which range from lifestyle changes to medication. Finally, it emphasises the importance of seeking medical help for persistent sleep problems and the potential impact of untreated sleep disorders on overall health.