A sleep disorder is any condition that disrupts normal sleep, affecting its quantity, quality, or timing.Common types include:Insomnia: Difficulty falling or staying asleep.Sleep Apnea: Breathing repeatedly stops and starts during sleep.Restless Legs Syndrome (RLS): Irresistible urge to move legs, especially at night.Narcolepsy: Excessive daytime sleepiness with sudden sleep attacks.Parasomnias: Abnormal behaviors during sleep (e.g., sleepwalking, sleep terrors).Circadian Rhythm Disorders: Misalignment of the body's internal clock (e.g., jet lag, shift work disorder).These disorders can severely impact daily life and often require medical diagnosis and treatment.