Insomnia
Insomnia is a sleeping disorder characterized by the inability to fall asleep and/or the inability to remain asleep for a reasonable amount of time. Insomniacs have been known to complain about being unable to close their eyes or "rest their mind" for more than a few minutes at a time. Both organic and non-organic insomnia constitute a sleep disorder.
According to the U.S. Department of Health and Human Services, approximately 60 million Americans suffer from insomnia each year. Insomnia tends to increase with age and affects about 40 percent of women and 30 percent of men.
