is defined as inadequate or poor-quality sleep despite having adequate time to sleep. Insomnia may take the form of difficulty falling asleep, or middle-of-the-night or early-morning awakening. It may be a short-term problem or occur more often over a long period of time.
It becomes more common as you get older.
Over the course of a year, about one third to one half of adults experience some level of insomnia. About 10%-15% have more severe or chronic insomnia. It may cause problems during the day, such as tiredness, a lack of energy, difficulty concentrating, and irritability.
Insomnia is not a disease. Instead, it is a result of a behavior or a symptom of an underlying mental or physical problem. There are many causes of insomnia.
Short-term insomnia is often due to temporary situations. It generally occurs in people who are experiencing one or more of the following:
A life crisis or stress
A change in the sleep environment, including factors such as noise, light, or temperature
Sleep/wake schedule problems such as with jet lag or temporary shift work
Side effects of medication
Chronic insomnia often results from a medical condition. Examples include:
EBSCO Information Services is fully accredited by URAC. URAC is an independent, nonprofit health care accrediting organization dedicated to promoting health care quality through accreditation, certification and commendation.
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
To send comments or feedback to our Editorial Team regarding the content please email us at email@example.com. Our Health Library Support team will respond to your email request within 2 business days.