Overview: Insomnia is a pattern of difficulty initiating sleep, maintaining sleep, or waking too early and not being able to return to sleep. It may be brief or long-lasting and often leads to reduced daytime functioning. The condition is usually described as a symptom rather than a single disease. People who frequently experience it are commonly called insomniacs.

Characteristics and types

Insomnia can present as trouble falling asleep (sleep onset insomnia), trouble staying asleep (sleep maintenance insomnia), or non-restorative sleep. Clinicians often distinguish between acute (short-term) and chronic insomnia. Severity is measured by how much sleep disturbance interferes with daily life, mood, and performance.

Common causes and risk factors

Many factors can contribute to insomnia: psychological stress, anxiety and mood disorders, pain or other medical conditions, certain medications and substances (including caffeine and alcohol), irregular work schedules, and poor sleep environments. Age, lifestyle, and genetic vulnerability can increase risk. Disruptions of the body clock or circadian rhythm are another frequent contributor.

Diagnosis and distinctions

Diagnosis is mainly clinical, based on history, sleep patterns and their impact on daytime functioning. Patients may keep a sleep diary or use questionnaires. Polysomnography is not routinely required but helps exclude other sleep disorders such as sleep apnea or restless legs syndrome. Insomnia is distinct from these disorders even though they can co-occur.

Treatment and management

Initial approaches emphasize non-drug strategies. Sleep hygiene and behavioral measures are central, along with cognitive behavioral therapy for insomnia (CBT-I), which is considered first-line for persistent problems. Short-term medication may be used selectively under medical supervision. Treating underlying medical or psychiatric conditions is important.

Self-help measures and importance

  • Keep a consistent sleep-wake schedule and a relaxing bedtime routine.
  • Limit caffeine, alcohol and heavy meals before bed; reduce evening screen time.
  • Create a comfortable, dark, quiet sleep environment and use the bed for sleep only.

For general information about normal sleep and its stages, or when insomnia persists and affects daily life, consult a healthcare professional. Addressing insomnia can improve mood, cognitive performance and overall health.