Sleep disorder refers to any problem that interferes with normal sleep patterns or prevents a person from getting enough restorative sleep. These conditions can be broadly categorized into three types - insomnia (difficulty falling asleep), hypersomnia (excessive daytime sleepiness) and parasomnias (abnormal behaviors during sleep). Sleep disorders are often chronic, meaning they persist over time, but may also be acute or short-term. They can have a significant impact on an individual's quality of life, as well as their physical and mental health. Some common examples include obstructive sleep apnea (OSA), restless leg syndrome (RLS) and narcolepsy. Treatment for these conditions may involve lifestyle changes, medication or medical intervention depending on the severity of the disorder.