Circadian rhythms are intrinsic, endogenous biological cycles that regulate a wide range of physiological, behavioral, and biochemical processes in the human body over an approximately 24-hour period. These rhythms are synchronized with external environmental cues, primarily the light–dark cycle, and are essential for maintaining homeostasis and optimal functioning of bodily systems. However, in contemporary society, rapid technological advancements, urbanization, and evolving lifestyle patterns have increasingly disrupted natural circadian alignment. Factors such as irregular sleep schedules, night-shift work, excessive exposure to artificial light, and prolonged use of electronic devices have contributed significantly to circadian misalignment, commonly referred to as chronodisruption. The present study investigates the multifaceted effects of irregular circadian rhythms on human health using a comprehensive analytical and reviewbased approach. The study examines key domains including sleep regulation, metabolic function, cardiovascular health, mental wellbeing, endocrine balance, and immune response. Data were synthesized from recent peer-reviewed literature, clinical studies, and reports from international health organizations. The findings reveal that circadian disruption is strongly associated with a wide range of adverse health outcomes, including sleep disorders, obesity, type 2 diabetes, cardiovascular diseases, mood disorders, cognitive impairment, and compromised immune function. Furthermore, emerging evidence suggests that chronic circadian misalignment may increase the risk of longterm conditions such as cancer and neurodegenerative diseases. The study underscores the importance of maintaining circadian regularity through lifestyle modifications and highlights the need for integrating chronobiological principles into public health policies and clinical practice to mitigate the growing burden of circadianrelated health disorders