Narcolepsy is a chronic neurological disorder that affects the brain's ability to regulate sleep-wake cycles. People with narcolepsy often experience excessive daytime sleepiness, sudden sleep attacks, and disrupted nighttime sleep. In some cases, they may also have symptoms like cataplexy (sudden muscle weakness), sleep paralysis, and vivid hallucinations. The exact cause is often linked to low levels of a brain chemical called hypocretin. While there is no cure, treatment options such as lifestyle changes, scheduled naps, and prescribed medications can help manage symptoms. Early diagnosis and proper care are essential for improving daily functioning and quality of life.