Hypersomnia
Excessive daytime sleepiness or prolonged sleep at night. People with hypersomnia may get 10 hours of sleep at a time or more. They are often excessively drowsy during the day. Hypersomnia can be the result of certain cancers, depression or have no known cause (idiopathic hypersomnia).

Insomnia
Sleep disorder defined as the perception or complaint of not enough or poor-quality sleep.

Parasomnias
Unintended events or actions that happen during sleep, while falling asleep or while waking up. Common parasomnias include sleepwalking, sleep talking, bedwetting (also called enuresis) and night terrors.

Restless Leg Syndrome (RLS)
A neurological condition. People who have it experience uncontrollable urges to move their legs, creepy crawly feeling, as well as leg pain and discomfort. Episodes of restless legs syndrome often occur at night, which can make sleeping difficult.

Sleep Apnea
A common, potentially life-threatening sleep disorder that most commonly occurs when a person's airway collapses or becomes blocked (this is called obstructive sleep apnea). People with sleep apnea experience pauses in their breathing or shallow breathing while they are asleep.

Snoring
Occurs when the soft tissue surrounding the upper airway vibrates as you breathe. It is quite common — about half of all adults snore occasionally. Men snore more than women, and people who are overweight are also more prone to snoring. While snoring can disrupt your bed partner's sleep, it can also cause frequent awakenings at night and daytime sleepiness for the person who snores.