Sleep disorders
Sleep disorders are a group of conditions that affect the quality and quantity of sleep. These disorders include insomnia, sleep apnea, restless legs syndrome, and narcolepsy, among others. Insomnia involves difficulty falling asleep, staying asleep, or waking up too early. Sleep apnea involves interruptions in breathing during sleep, which can lead to daytime sleepiness and fatigue. Restless legs syndrome involves uncomfortable sensations in the legs that are relieved by movement. Narcolepsy involves excessive daytime sleepiness and sudden episodes of sleep.
The exact cause of sleep disorders is not known, but genetic, environmental, and lifestyle factors are thought to play a role. Risk factors for sleep disorders include obesity, age, stress, and certain medical conditions such as depression and anxiety.