Insomnia is characterized as the inability to fall asleep, stay asleep, or waking too early in the morning. These types of sleep disruptions are often indicators of other medical or psychological problems, such as sleep disorders, depression, or anxiety.

Common symptoms of sleep apnea include loud snoring, episodes of breathing cessation during sleep witnessed by another person, abrupt awakenings accompanied by shortness of breath, awakening with a dry mouth or sore throat, morning headache, difficulty staying asleep, excessive daytime sleepiness, attention problems, and irritability. 

Narcolepsy is a sleep disorder characterized by excessive sleepiness, sleep paralysis, hallucinations, and in some cases, episodes of cataplexy (partial or total loss of muscle control, often triggered by a strong emotion such as laughter).

Restless Leg Syndrome is a condition that causes an uncontrollable urge to move your legs, usually because of an uncomfortable sensation. It typically happens in the evening or nighttime hours when you're sitting or lying down. Moving eases the unpleasant feeling temporarily. The sensations, which generally occur within the limb rather than on the skin, are commonly described as crawling, creeping, pulling, throbbing, aching, itching, and electric.