Types of Insomnia

Acute vs. Chronic Insomnia. Insomnia also varies in how long it lasts and how often it occurs. It can be short-term (acute insomnia) or can last a long time (chronic insomnia). It can also come and go, with periods of time when a person has no sleep problems. Acute insomnia can last from one night to a few weeks.

Acute vs. Chronic Insomnia Insomnia also varies in how long it lasts and how often it occurs. It can be short-term (acute insomnia) or can last a long time (chronic insomnia). It can also come and go, with periods of time when a person has no sleep problems. Acute insomnia can last from one night to a few weeks. Insomnia is called chronic when a person has insomnia at least three nights a week for a month or longer.

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Secondary insomnia: Secondary insomnia means that a person is having sleep problems because of something else, such as a health condition (like asthma, depression, arthritis, cancer, or heartburn); pain; medication they are taking; or a substance they are using (like alcohol).

Sleep maintenance insomnia is a common, irritating sleep pattern that affects millions of people. Its simple definition is this: when a person wakes up in the middle of the night and can't get back to sleep.

Narcolepsy is a neurological disorder that affects a person's sleep/wake cycle. Learn more from WebMD about the causes, symptoms, and treatment of this sleep disorder.

Obstructive sleep apnea is the most common type of apnea. Find out more about why this common sleep disorder happens and how it's treated.

WebMD explains the symptoms and causes of insomnia, and offers tips for getting a good night's sleep.

Periodic limb movement disorder (PLMD) is repetitive cramping or jerking of the legs during sleep. It is the only movement disorder that occurs only during sleep, and it is sometimes called periodic leg (or limb) movements during sleep.

REM sleep is usually associated with dreaming. REM sleep accounts for 20%-25% of the sleep period. In a person with REM sleep behavior disorder (RBD), the paralysis that normally occurs during REM sleep is incomplete or absent, allowing the person to "act out" his or her dreams.

Johns Hopkins researchers believe they may have discovered an explanation for the sleepless nights associated with restless legs syndrome (RLS), a symptom that persists even when the disruptive, overwhelming nocturnal urge to move the legs is treated successfully with medication.

What causes restless legs syndrome? In most cases, the cause of RLS is unknown (called primary RLS). However, RLS has a genetic component and can be found in families where the onset of symptoms is before age 40. Specific gene variants have been associated with RLS.

Insomnia The most common sleep complaint occurs when you have trouble falling asleep, staying asleep or do not feel refreshed in the morning. Daytime fatigue and other effects of insomnia can impact nearly every aspect of your life.

In-depth information about Upper Airway Resistance Syndrome from the Ohio Sleep Medicine Institute