Circadian rhythm disorders originate from disruptions in the body's natural clock, often involving the hypothalamus and suprachiasmatic nucleus (SCN). Causes include brain damage, vision impairments, travel, shift work, and unknown factors. Risk factors encompass age, genetics, air travel direction, shift timing changes, and neurodevelopmental differences like ADHD or autism spectrum disorder. Complications range from difficulties in school or work schedules to the development of other sleep disorders like chronic insomnia. Substance misuse, accidents, and injuries are potential consequences due to daytime sleepiness. Management involves addressing underlying causes through lifestyle adjustments, medical interventions, and behavioral therapies. Diagnosis entails a comprehensive assessment, including questionnaires, exams, lab testing, imaging scans, and sleep logs. Treatments vary, including adjusting lighting, taking melatonin supplements, and behavioral adjustments. Prevention is challenging, but maintaining good sleep habits and limiting exposure to disruptive factors like bright lights may help mitigate risk. However, jet lag from air travel across time zones remains a normal consequence.