Circadian rhythm disruption refers to the disturbance of the body's natural internal clock, which regulates sleep-wake cycles and other physiological processes. This disruption can occur due to irregular sleep patterns, shift work, or exposure to artificial light at night. It can lead to various health issues, including sleep disorders, mood changes, and metabolic problems. When circadian rhythms are disrupted, the body's ability to function optimally is affected. For example, the hormone melatonin, which helps regulate sleep, may be produced at inappropriate times. This can result in fatigue, decreased alertness, and difficulty concentrating, impacting overall well-being and daily performance.