The word insomnia comes from the Latin in (“no”) and somnus
(“sleep”) and literally it means “no sleep.” Although people with
insomnia often feel they get no sleep at all, most often the problem
is difficulty getting enough restful sleep.
Everyone experiences a bad night or two of sleep now and
then. These occasional bouts of insomnia can be caused by stress
(such as the anticipation of starting a new job, the worry of los-
ing the one you have, an impending marriage or house purchase,
and so on); a new or disruptive sleep environment (such as trying
to sleep in a hotel on a business trip); or disruption of your usual
circadian cycle (such as jet lag after flying to Europe or problems
caused by staying up late on weekends). When these occasional
nights of poor sleep become regular occurrences, insomnia moves
from a minor annoyance to a full-fledged sleep disorder.
For more information on insomnia:
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