Sleep disorders are a group of conditions that affect the quality, timing, and duration of sleep. There are many different types of sleep disorders, including:

1. Insomnia: difficulty falling or staying asleep, or waking up too early
2. Sleep apnea: pauses in breathing or shallow breathing during sleep
3. Restless legs syndrome: a strong urge to move the legs, often accompanied by discomfort or pain
4. Narcolepsy: excessive daytime sleepiness and sudden sleep attacks
5. Parasomnias: abnormal behaviors during sleep, such as sleepwalking, night terrors, and REM sleep behavior disorder
6. Circadian rhythm disorders: disruptions in the body's internal biological clock, leading to sleep problems and daytime fatigue

Other common sleep disorders include snoring, sleep-related eating disorder, and sleep-related movement disorders.

Sleep disorders can have a significant impact on overall health and well-being, leading to daytime fatigue, decreased cognitive function, and increased risk of accidents and injuries. Treatment options vary depending on the type of sleep disorder and may include medication, lifestyle changes, and various therapies, such as cognitive-behavioral therapy and light therapy.