Insomnia is a widespread sleep disorder that affects a significant portion of the global population. According to research, an estimated 30%-50% of the general population are affected by insomnia, and 10% have chronic insomnia. Despite its prevalence, few individuals seek medical advice, often unaware of the behavioral and medical options available for treatment.
What Is Insomnia?
Insomnia is defined as "difficulty initiating or maintaining sleep, or both" or the perception of poor quality sleep. It is not a stand-alone diagnosis or a disease but a symptom that may result from inadequate quality or quantity of sleep. Notably, insomnia is not defined by a specific number of hours of sleep, as individuals vary widely in their sleep needs and practices.
The condition can leave individuals feeling dull, lethargic, and listless, with no energy for work or play. Lack of adequate sleep also poses great risks, including an increased risk of heart disease and cancer. Furthermore, sleep benefits the brain, with findings suggesting it can make one smarter.
Types and Causes of Insomnia
Insomnia can be classified by the duration of symptoms into transient, short-term, or chronic. Transient insomnia generally lasts less than seven days; short-term insomnia lasts about one to three weeks; and chronic insomnia lasts for months or even years.
Many causes of transient and short-term insomnia include changes in shift work, excessive or unpleasant noise, uncomfortable room temperature (too hot or too cold), stressful situations in life (such as exam preparation, loss of a loved one, unemployment, divorce, or separation), presence of an acute medical or surgical illness or hospitalization, withdrawal from drug, alcohol, sedative, or stimulant medications, and insomnia related to high altitude (mountains). Uncontrolled physical symptoms like pain, fever, breathing problems, nasal congestion, cough, and diarrhea can also cause insomnia. Controlling these symptoms and their underlying causes may lead to resolution of insomnia.
Chronic Insomnia and Mental Health
The majority of causes of chronic or long-term insomnia are usually linked to an underlying psychiatric or physiologic (medical) condition. These include anxiety, depression, stress (mental, emotional, situational, etc.), schizophrenia, and/or mania (bipolar disorder). Insomnia may be an indicator of depression, and many people will have insomnia during the acute phases of a mental illness. Out of all the other secondary medical and psychological causes of insomnia, anxiety and depression are the most common.
Stress most commonly triggers short-term or acute insomnia. If not addressed, it may develop into chronic 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.
Who Is at Risk?
Insomnia affects all age groups. Among adults, it affects women more often than men, and 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. Certain age groups and conditions are more prone to insomnia, including seniors, adolescents or young adult students, pregnant women, women in menopause, those who abuse drugs, and alcoholics.
The consequences of insomnia are far-reaching. Lack of sleep can lead to poor concentration and focus, difficulty with memory, impaired motor coordination, irritability, and impaired social interaction. Additionally, fatigued, sleep-deprived drivers are at a higher risk of motor vehicle accidents. Recognizing the signs and seeking appropriate treatment is crucial to mitigate these risks and improve overall wellbeing.
