This conceptual image shows a clock with arrows entering in an orderly fashion and exiting in a chaotic pattern, symbolising the confusion of the body’s circadian rhythm after rapid time zone changes. Jet lag occurs when the body’s internal clock becomes misaligned with the local time at the travel destination. Causes include flying across multiple time zones, disrupted light exposure, irregular sleep schedules, and lack of physical adjustment time. The image illustrates the core mechanism of jet lag—circadian rhythm disturbance—and its impact on energy, mood, sleep, and overall well-being.