Definition of Insomnia
Insomnia is the perception or complaint of inadequate or poor-quality sleep because of difficulty falling asleep, difficulty maintaining sleep, or waking too early in the morning. These result in the feeling that sleep is not restorative and often are associated with impaired function during the day.
Description of Insomnia
Insomnia is the most common sleep disorder in the United States. About one-third of the adult population has experienced it at some time and approximately 10% have a persistent problem.
Insomnia can be classified in terms of its duration: transient, short-term, and chronic. Transient and short-term insomnia are caused by similar factors, but short-term insomnia usually requires a greater disturbance.
Transient insomnia can be described as lasting from one night to a few weeks and is usually caused by events that alter your normal sleep pattern, such as traveling or sleeping in an unusual environment (e.g., a hotel).
Short-term insomnia lasts about two to three weeks and is usually attributed to emotional factors such as worry or stress.
Chronic insomnia occurs most nights and lasts a month or more.
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