Insomnia

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Medical Author:

Siamak T. Nabili, MD, MPH

Siamak T. Nabili, MD, MPH

Dr. Nabili received his undergraduate degree from the University of California, San Diego (UCSD), majoring in chemistry and biochemistry. He then completed his graduate degree at the University of California, Los Angeles (UCLA). His graduate training included a specialized fellowship in public health where his research focused on environmental health and health-care delivery and management.

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Medical Editor:

Melissa Conrad Stöppler, MD, Chief Medical Editor

Melissa Conrad Stöppler, MD, Chief Medical Editor

Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

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• Insomnia Overview
• Insomnia Causes
• Insomnia Symptoms
• Primary Sleep Disorders
• When to Seek Medical Care
• Insomnia Diagnosis
• Insomnia Treatment
• Insomnia Non-Medical Treatment and Behavioral Therapy
• Insomnia Medical Treatment
• Insomnia Medications and Medical Therapy
• Follow-up
• Insomnia Prevention
• Insomnia Prognosis
• For More Information
• Synonyms and Keywords
• Authors and Editors
• Read more on Insomnia from Healthwise
• Viewer Comments: Insomnia - Describe Your Treatment
• Viewer Comments: Insomnia - Describe Your Experience

Insomnia Overview

Most adults have experienced insomnia or sleeplessness at one time or another in their lives. An estimated 30%-50% of the general population are affected by insomnia, and 10% have chronic insomnia.

Insomnia is a symptom, not a stand-alone diagnosis or a disease. By definition, insomnia is "difficulty initiating or maintaining sleep, or both" or the perception of poor quality sleep. Insomnia may therefore be due to inadequate quality or quantity of sleep. Insomnia is not defined by a specific number of hours of sleep that one gets, since individuals vary widely in their sleep needs and practices. Although most of us know what insomnia is and how we feel and perform after one or more sleepless nights, few seek medical advice. Many people remain unaware of the behavioral and medical options available to treat insomnia.

Insomnia is generally classified based on the duration of the problem. Not everyone agrees on one definition, but generally:

• symptoms lasting less than one week are classified as transient insomnia,
  
  
• symptoms between one to three weeks are classified as short-term insomnia, and
  
  
• those longer than three weeks are classified as chronic insomnia.

Statistics on Insomnia

Insomnia affects all age groups. Among adults, insomnia affects women more often than men. The incidence tends to increase with age. It is typically more common in people in lower socioeconomic (income) groups, chronic alcoholics, and mental health patients. Stress most commonly triggers short-term or acute insomnia. If you do not address your insomnia, however, it may develop into chronic insomnia.

Some surveys have shown that 30% to 35% of Americans reported difficulty falling asleep during the previous year and about 10% reported problems with long standing insomnia. There also seems to be an association between depression, anxiety, and insomnia. Although the nature of this association is unknown, people with depression or anxiety were significantly more likely to develop insomnia.