Insomnia may be caused by a host of different reasons. These causes may be divided into situational factors, medical or psychiatric conditions, or primary sleep problems. Transient insomnia generally last less than seven days; short-term insomnia usually lasts for about one to three weeks, and chronic insomnia lasts for more than three weeks.
23:57, 25 May 2011
Caffeine, stress/anxiety, or even environmental factors such as noise, light, or temperature.
22:47, 23 May 2011
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