Circadian Rhythm Disorder refers to a disruption in the body's natural internal clock, which regulates sleep-wake cycles over a 24-hour period. This disorder can lead to difficulties in falling asleep, staying asleep, or waking up at the desired time. Factors such as shift work, travel across time zones, and irregular sleep patterns can contribute to this condition. Individuals with Circadian Rhythm Disorder may experience symptoms like insomnia, excessive daytime sleepiness, and difficulty concentrating. Treatment options often include lifestyle changes, light therapy, and, in some cases, medication to help realign the body's internal clock with the external environment.