Common Sleep Disorders

Chronic Fatigue Syndrome

Constant tired feeling that persists even when an individual gets enough sleep. Usually a sign of a larger health problem or disease.

Excessive Snoring

Frequent snoring is often a sign of a more serious sleep disorder, such as Obstructive Sleep Apnea. Even if it isn’t serious, it can be a great nuisance to sleeping partners, and can cause relationship problems.


A disorder which causes muscle pain and fatigue.


Affliction of children that prevents them from falling asleep or from sleeping at the proper times.


Excessive sleeping or sleeping for inappropriately long periods of time.

Hypnagogic Startle

Involuntary twitching that occurs before the onset of sleep.


A disorder in which an individual has a difficult time falling asleep, wakes frequently during the night, or wakes up earlier than they would like, which persists for an extended period of time and prevents proper sleeping.


A disorder which causes individuals to fall asleep at inappropriate times such as when walking or driving. It can be accompanied by Cataplexy, feelings of paralysis and limpness during waking hours.


Frightening or stressful dreams.

Night Terrors

Nightmares in which the sleeper appears to be awake and experiences extreme distress, yet cannot be awakened from REM sleep.


Frequent urination at night.

Nocturnal Enuresis (Bedwetting)

Accidentally urinating while asleep.

Paroxysmal nocturnal dyspnea (PND)

An abnormal condition in which a person must keep the head elevated (sit or stand) to breathe deeply or comfortably.

Pickwickian Syndrome

A disorder that affects overweight individuals which causes them to be sedentary, sleepy, and have a low concentration of oxygen in the bloodstream.

Somnambulism (Sleep Walking)

Walking or moving around during REM sleep. This can be a disturbing disorder as it may cause injuries or accidents.

Restless Legs Syndrome (RLS)

Sleep disorder characterized by an itching, creeping, or crawling sensation in the legs that tends to occur when an individual is asleep.

Restlessness (“tossing and turning”)

Difficulty in sleeping comfortably, moving frequently during the night.

REM Sleep Behavior Disorder (RBD)

Disorder in which REM motor atonia is partially or completely absent (sleeper retains physical motion) and the individual acts out the ongoing dream.

Sleep Apnea

A disorder that causes a sleeper to stop breathing for a short period of time while sleeping.

Sleep Bruxism

Clenching or grinding of the teeth during sleep. This can cause dental and jaw problems.

Sleep Debt

Sleep deficit caused by an individual sleeping for a shorter period of time than is healthy, usually to accommodate a busy or stressful lifestyle. Sleep debts accumulate over time and can cause mental and physical health problems.

Sleep Deprivation

Not getting the required amount of sleep.

Sleep Hyperhidrosis

Excessive sweating during sleep.

Sleep Inertia

Feelings of grogginess or sleepiness that persist longer than 10 to 20 minutes after waking up. Commonly seen as people who “can’t function” without caffeine.

Sleep Paralysis

Waking and not being able to move for a short period of time, occurs when waking out of REM (dream) sleep.

Somnolence / Excessive Daytime Sleepiness (EDS)

Excessive and inappropriate sleepiness during daytime hours and activities. This can cause many problems such as poor school or work performance, or accidents.

Sudden Infant Death Syndrome (SIDS)

Sudden and unexpected death of an apparently healthy infant, whose death remains unexplained after the performance of an adequate postmortem investigation. Death usually occurs during sleep.

This website is provided for general information only, and should not be treated as a substitute for the medical advice of your own doctor or any other health care professional. Classic Brands is not responsible or liable for any diagnosis made by a user based on the content of this website. Always consult your own GP if you’re in any way concerned about your health.