Insomnia is difficulty getting to sleep or staying asleep, or
having nonrefreshing sleep for at least 1 month.
Psychophysiological insomnia; Learned insomnia; Chronic
insomnia; Primary insomnia Causes, incidence, and risk factors:
Primary insomnia refers to insomnia that is not caused by any
known physical or mental condition. Insomnia is caused by many
different things. The most common causes of insomnia are:
Secondary insomnia is caused by a medical condition. Depression
is a very common cause of secondary insomnia. Often, insomnia is
the symptom that causes people with depression to seek medical
help. - Difficulty falling asleep on most nights - Feeling tired
during the day or falling asleep during the day - Not feeling
refreshed when you wake up - Waking up several times during
sleep People who have primary insomnia tend to keep thinking
about getting enough sleep. The more they try to sleep, the
greater their sense of frustration and distress, and the more
difficult sleep becomes. Signs and tests: Your h