Insomnia

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What Is Insomnia?

Insomnia is a sleep disorder characterized by difficulty falling asleep, staying asleep, waking earlier than intended, or obtaining restorative sleep despite having an adequate opportunity to sleep. It may be short term or become chronic when symptoms occur repeatedly over several months.

Poor sleep can affect concentration, mood, reaction time, work performance, and physical health. Chronic insomnia is more than occasional sleeplessness and often continues because of interacting behavioral, psychological, and medical factors.

What Causes Insomnia?

Insomnia can be triggered by stress, major life changes, travel, shift work, pain, illness, menopause, mental health conditions, or use of certain medicines and substances. Irregular sleep schedules and spending long periods awake in bed can reinforce the problem.

Other sleep disorders, including sleep apnea, restless legs syndrome, and circadian rhythm disorders, may produce similar complaints. Caffeine, nicotine, alcohol, and some decongestants, stimulants, corticosteroids, or antidepressants can also interfere with sleep.

Diagnosis

Diagnosis is based on a detailed sleep and medical history, the frequency and duration of symptoms, and their effect during the day. A sleep diary or actigraphy may be used, while an overnight sleep study is generally reserved for suspected sleep apnea, movement disorders, or another sleep condition.

Treatment Options

Cognitive behavioral therapy for insomnia (CBT-I) is the preferred first-line treatment for chronic insomnia. It combines sleep scheduling, stimulus control, relaxation strategies, and techniques that change unhelpful beliefs and habits around sleep.

Sleep hygiene supports treatment but is often insufficient on its own. Prescription sleep medicines may be considered for selected patients, usually for limited periods or with careful monitoring based on age, other conditions, and the risk of side effects or dependence.

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Living With Insomnia

A regular wake time, a quiet and dark bedroom, morning daylight exposure, and limiting late caffeine, alcohol, heavy meals, and screen use can support the body’s sleep-wake rhythm. Daytime exercise is helpful, but intense activity close to bedtime may keep some people alert.

People with insomnia should avoid driving or operating machinery when severely sleepy. Keeping a brief sleep diary can help identify patterns and allows a healthcare professional to tailor treatment.

When to Seek Emergency Care

Seek urgent help if sleeplessness is accompanied by suicidal thoughts, severe confusion, hallucinations, unusually elevated or agitated behavior, chest pain, breathing difficulty, or dangerous daytime sleepiness. These symptoms may indicate a medical or psychiatric emergency rather than uncomplicated insomnia.

Prognosis

Most people improve when the underlying contributors are addressed and evidence-based behavioral treatment is followed consistently. Relapses can occur during stressful periods, but CBT-I skills can help prevent occasional poor sleep from becoming persistent again.

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Risks

Risk factors for insomnia include older age, female sex, pregnancy or menopause, irregular work schedules, frequent travel across time zones, chronic pain, respiratory or neurological disease, anxiety, depression, trauma, substance use, and a family tendency toward sleep problems. Persistent insomnia may increase the risk of accidents and is associated with worsening mood, cardiovascular, and metabolic health.

Symptoms

Symptoms include taking a long time to fall asleep, repeated nighttime awakenings, waking too early, light or unrefreshing sleep, daytime fatigue, irritability, low mood, poor concentration, memory problems, reduced motivation, headaches, and increased errors or accidents. Some people become increasingly worried about sleep, which can further delay sleep onset.

Diagnosis

Diagnosis begins with questions about sleep timing, bedtime routines, awakenings, naps, work schedule, medications, caffeine and alcohol use, medical conditions, and daytime impairment. Chronic insomnia is considered when sleep difficulty occurs regularly despite adequate opportunity for sleep and causes meaningful daytime consequences.

A sleep diary completed over one to two weeks is often useful. Physical examination, blood testing, actigraphy, or polysomnography may be ordered when symptoms suggest thyroid disease, sleep apnea, restless legs syndrome, circadian rhythm disruption, or another underlying disorder.