Causes and Risk Factors
Insomnia usually has more than one contributing cause, and identifying those contributors is the first step toward better sleep:- Stress and life events: Work pressures, grief, illness, or major life changes can keep the mind active at night and start a self-perpetuating cycle of poor sleep.
- Sleep habits: Irregular bedtimes, late-evening screen use, long daytime naps, and caffeine or alcohol close to bedtime all interfere with the body's natural sleep drive.
- Shift work and travel: Overnight or rotating schedules and frequent time-zone changes push the body's internal clock out of sync with the hours you want to sleep.
- Mental health conditions: Insomnia is closely linked with anxiety and depression, and each condition can worsen the other.
- Medical conditions: Chronic pain, nighttime heartburn from acid reflux, an overactive thyroid, frequent nighttime urination, and sleep apnea can all fragment sleep.
- Medications and substances: Some antidepressants, steroids, decongestants, and stimulants, as well as nicotine and alcohol, disturb normal sleep patterns.
Symptoms
People with insomnia may notice:- Difficulty falling asleep: Lying awake for long stretches at bedtime despite feeling tired.
- Frequent awakenings: Waking during the night and struggling to return to sleep.
- Early-morning waking: Waking well before the alarm and being unable to doze off again.
- Daytime effects: Fatigue, irritability, low mood, trouble concentrating, and drowsiness while driving or working.
- Worry about sleep: Growing anxiety about bedtime itself, which further delays sleep.
Diagnosis
Insomnia is diagnosed primarily from your history: sleep patterns, bedtime routine, caffeine and alcohol use, medications, mood, and daytime symptoms. Keeping a sleep diary for one to two weeks is often revealing. If you snore loudly, gasp during sleep, or a partner has witnessed pauses in your breathing, your physician may order a sleep study to check for sleep apnea, and blood tests can rule out contributors such as thyroid disease. Short-term insomnia often improves once a triggering stress passes; insomnia that persists for three months or more rarely resolves without targeted treatment, so it is worth raising at your next visit.Treatment
Treatment targets both the habits that maintain insomnia and any underlying conditions:- Cognitive behavioral therapy for insomnia (CBT-I): The recommended first-line treatment. CBT-I retrains unhelpful thoughts and behaviors around sleep and produces more durable results than medication alone.
- Sleep habits: A consistent wake time, a dark and cool bedroom, limiting caffeine after midday, avoiding alcohol near bedtime, and reserving the bed for sleep.
- Medications: When appropriate, options include sedative-hypnotics such as zolpidem, orexin receptor antagonists such as suvorexant and lemborexant, and low-dose sedating antidepressants such as trazodone. These are generally used at the lowest effective dose for the shortest practical time under medical supervision.
- Treating underlying conditions: Managing pain, reflux, mood disorders, or thyroid problems often improves sleep on its own.