Transient insomnia can be triggered by a number of factors, including: It is as common in men as in women, and is more likely if there is a previous history of a sleep disorder or if the individual can become very emotional. Often transient insomnia is linked to an event that has been particularly traumatic. It is usually defined as insomnia that lasts for less than 3 weeks. The diagnosis of transient insomnia is often made once it has been relieved. There are three main types of insomnia that are defined by the time-course of the insomnia: Terminal insomnia is common in the elderly, in individuals experiencing depression, and in women going through menopause. Terminal insomnia occurs in individuals who wake up too early in the morning. This type of insomnia can often be the result of pain or other illness.
Middle insomnia refers to waking in the middle of the night and difficulty sleeping for long periods.
